./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:47:05,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:47:05,045 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:47:05,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:47:05,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:47:05,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:47:05,072 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:47:05,073 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:47:05,073 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:47:05,074 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:47:05,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:47:05,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:47:05,075 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:47:05,076 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:47:05,077 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:47:05,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:47:05,077 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:47:05,077 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:47:05,077 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:47:05,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:47:05,080 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:47:05,081 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:47:05,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:47:05,081 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:47:05,081 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:47:05,081 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:47:05,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:47:05,081 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:47:05,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:47:05,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:47:05,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:47:05,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:47:05,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:47:05,082 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:47:05,082 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:47:05,082 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:47:05,082 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:47:05,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:47:05,083 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:47:05,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:47:05,083 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:47:05,084 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:47:05,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 [2024-11-18 13:47:05,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:47:05,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:47:05,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:47:05,308 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:47:05,308 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:47:05,309 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2024-11-18 13:47:06,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:47:06,659 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:47:06,660 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2024-11-18 13:47:06,670 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/565d54294/d5888affb6014defa288679651fea2f8/FLAG447736619 [2024-11-18 13:47:07,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/565d54294/d5888affb6014defa288679651fea2f8 [2024-11-18 13:47:07,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:47:07,067 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:47:07,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:47:07,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:47:07,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:47:07,072 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43598330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07, skipping insertion in model container [2024-11-18 13:47:07,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,090 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:47:07,219 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2024-11-18 13:47:07,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:47:07,242 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:47:07,252 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2024-11-18 13:47:07,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:47:07,277 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:47:07,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07 WrapperNode [2024-11-18 13:47:07,278 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:47:07,279 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:47:07,279 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:47:07,279 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:47:07,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,289 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,304 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-11-18 13:47:07,304 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:47:07,305 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:47:07,305 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:47:07,305 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:47:07,312 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,313 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,323 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-18 13:47:07,325 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,325 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,328 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,330 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,332 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:47:07,333 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:47:07,333 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:47:07,333 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:47:07,333 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (1/1) ... [2024-11-18 13:47:07,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:47:07,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:07,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 13:47:07,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 13:47:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:47:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:47:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 13:47:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:47:07,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:47:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 13:47:07,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 13:47:07,453 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:47:07,456 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:47:07,591 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-18 13:47:07,591 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:47:07,599 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:47:07,599 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 13:47:07,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:47:07 BoogieIcfgContainer [2024-11-18 13:47:07,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:47:07,601 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:47:07,601 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:47:07,603 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:47:07,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:47:07" (1/3) ... [2024-11-18 13:47:07,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e808399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:47:07, skipping insertion in model container [2024-11-18 13:47:07,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:47:07" (2/3) ... [2024-11-18 13:47:07,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e808399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:47:07, skipping insertion in model container [2024-11-18 13:47:07,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:47:07" (3/3) ... [2024-11-18 13:47:07,605 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2024-11-18 13:47:07,616 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:47:07,617 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:47:07,655 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:47:07,660 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;@6af0135b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:47:07,660 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:47:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 13:47:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-18 13:47:07,667 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:07,668 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:07,668 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:07,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:07,671 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2024-11-18 13:47:07,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:07,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994578609] [2024-11-18 13:47:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:07,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:47:07,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:07,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994578609] [2024-11-18 13:47:07,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994578609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:47:07,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:47:07,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 13:47:07,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111567777] [2024-11-18 13:47:07,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:47:07,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 13:47:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 13:47:07,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:47:07,817 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:47:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:07,830 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2024-11-18 13:47:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 13:47:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-18 13:47:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:07,836 INFO L225 Difference]: With dead ends: 49 [2024-11-18 13:47:07,836 INFO L226 Difference]: Without dead ends: 22 [2024-11-18 13:47:07,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:47:07,840 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:07,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:47:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-18 13:47:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-18 13:47:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 13:47:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-11-18 13:47:07,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2024-11-18 13:47:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:07,869 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-11-18 13:47:07,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:47:07,870 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-11-18 13:47:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-18 13:47:07,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:07,871 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:07,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 13:47:07,871 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:07,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2024-11-18 13:47:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:07,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456981800] [2024-11-18 13:47:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:47:08,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:08,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456981800] [2024-11-18 13:47:08,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456981800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:47:08,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:47:08,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 13:47:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454570718] [2024-11-18 13:47:08,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:47:08,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:47:08,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:08,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:47:08,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:47:08,033 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:47:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:08,087 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2024-11-18 13:47:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:47:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-18 13:47:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:08,089 INFO L225 Difference]: With dead ends: 35 [2024-11-18 13:47:08,090 INFO L226 Difference]: Without dead ends: 33 [2024-11-18 13:47:08,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:47:08,092 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:08,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:47:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-18 13:47:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2024-11-18 13:47:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 13:47:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-18 13:47:08,105 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2024-11-18 13:47:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:08,105 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-18 13:47:08,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:47:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-18 13:47:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-18 13:47:08,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:08,107 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:08,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 13:47:08,108 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:08,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2024-11-18 13:47:08,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770569310] [2024-11-18 13:47:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:08,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:47:08,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:08,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770569310] [2024-11-18 13:47:08,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770569310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:47:08,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:47:08,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 13:47:08,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995765212] [2024-11-18 13:47:08,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:47:08,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:47:08,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:47:08,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:47:08,227 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 13:47:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:08,278 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-11-18 13:47:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:47:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-18 13:47:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:08,280 INFO L225 Difference]: With dead ends: 39 [2024-11-18 13:47:08,280 INFO L226 Difference]: Without dead ends: 37 [2024-11-18 13:47:08,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:47:08,281 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:08,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:47:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-18 13:47:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2024-11-18 13:47:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 13:47:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-18 13:47:08,294 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2024-11-18 13:47:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:08,294 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-18 13:47:08,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 13:47:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-18 13:47:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-18 13:47:08,295 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:08,296 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:08,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 13:47:08,296 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:08,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:08,297 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2024-11-18 13:47:08,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:08,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775405331] [2024-11-18 13:47:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:08,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:47:08,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016948354] [2024-11-18 13:47:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:08,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:08,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:08,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 13:47:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:08,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-18 13:47:08,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 13:47:08,487 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 13:47:08,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:08,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775405331] [2024-11-18 13:47:08,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:47:08,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016948354] [2024-11-18 13:47:08,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016948354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:47:08,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:47:08,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 13:47:08,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392182742] [2024-11-18 13:47:08,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:47:08,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:47:08,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:08,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:47:08,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:47:08,490 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 13:47:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:08,543 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2024-11-18 13:47:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:47:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-18 13:47:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:08,545 INFO L225 Difference]: With dead ends: 56 [2024-11-18 13:47:08,545 INFO L226 Difference]: Without dead ends: 43 [2024-11-18 13:47:08,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:47:08,549 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:08,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 89 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:47:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-18 13:47:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-18 13:47:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-18 13:47:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2024-11-18 13:47:08,564 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 19 [2024-11-18 13:47:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:08,564 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2024-11-18 13:47:08,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 13:47:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2024-11-18 13:47:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-18 13:47:08,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:08,565 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:08,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 13:47:08,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:08,766 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:08,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2024-11-18 13:47:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222885428] [2024-11-18 13:47:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:47:08,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771131401] [2024-11-18 13:47:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:08,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:08,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:08,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 13:47:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:08,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-18 13:47:08,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 13:47:08,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 13:47:09,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:09,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222885428] [2024-11-18 13:47:09,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:47:09,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771131401] [2024-11-18 13:47:09,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771131401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:47:09,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:47:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-18 13:47:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956067877] [2024-11-18 13:47:09,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:47:09,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-18 13:47:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-18 13:47:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-18 13:47:09,067 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 13:47:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:09,134 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-11-18 13:47:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:47:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-11-18 13:47:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:09,136 INFO L225 Difference]: With dead ends: 56 [2024-11-18 13:47:09,136 INFO L226 Difference]: Without dead ends: 54 [2024-11-18 13:47:09,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:47:09,137 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:09,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 59 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:47:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-18 13:47:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-18 13:47:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-18 13:47:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-11-18 13:47:09,150 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 26 [2024-11-18 13:47:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:09,150 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-11-18 13:47:09,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 13:47:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-11-18 13:47:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-18 13:47:09,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:09,151 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:09,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 13:47:09,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:09,352 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:09,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:09,353 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2024-11-18 13:47:09,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:09,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617594104] [2024-11-18 13:47:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:09,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:47:09,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331133013] [2024-11-18 13:47:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:09,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:09,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:09,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:09,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 13:47:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:09,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-18 13:47:09,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 13:47:09,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-18 13:47:09,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617594104] [2024-11-18 13:47:09,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:47:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331133013] [2024-11-18 13:47:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331133013] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-18 13:47:09,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 13:47:09,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-18 13:47:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407276432] [2024-11-18 13:47:09,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:47:09,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:47:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:47:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:47:09,620 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 13:47:10,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-18 13:47:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:10,768 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-11-18 13:47:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:47:10,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-18 13:47:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:10,770 INFO L225 Difference]: With dead ends: 63 [2024-11-18 13:47:10,770 INFO L226 Difference]: Without dead ends: 61 [2024-11-18 13:47:10,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:47:10,771 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:10,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-18 13:47:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-18 13:47:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-11-18 13:47:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-18 13:47:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2024-11-18 13:47:10,781 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 36 [2024-11-18 13:47:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:10,781 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2024-11-18 13:47:10,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 13:47:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2024-11-18 13:47:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-18 13:47:10,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:10,782 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:10,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 13:47:10,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:10,987 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:10,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1438911711, now seen corresponding path program 1 times [2024-11-18 13:47:10,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:10,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591866408] [2024-11-18 13:47:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:10,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-18 13:47:11,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591866408] [2024-11-18 13:47:11,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591866408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:47:11,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:47:11,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 13:47:11,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812418756] [2024-11-18 13:47:11,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:47:11,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:47:11,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:47:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:47:11,089 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-18 13:47:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:11,129 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2024-11-18 13:47:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:47:11,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-11-18 13:47:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:11,131 INFO L225 Difference]: With dead ends: 68 [2024-11-18 13:47:11,131 INFO L226 Difference]: Without dead ends: 56 [2024-11-18 13:47:11,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:47:11,131 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:11,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:47:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-18 13:47:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-18 13:47:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-18 13:47:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-18 13:47:11,148 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2024-11-18 13:47:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:11,148 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-18 13:47:11,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-18 13:47:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-18 13:47:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-18 13:47:11,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:11,149 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:11,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-18 13:47:11,150 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:11,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2024-11-18 13:47:11,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:11,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489335696] [2024-11-18 13:47:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:11,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:47:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803656205] [2024-11-18 13:47:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:11,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:11,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:11,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 13:47:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:11,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-18 13:47:11,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-18 13:47:11,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-18 13:47:12,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:12,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489335696] [2024-11-18 13:47:12,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:47:12,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803656205] [2024-11-18 13:47:12,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803656205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:47:12,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:47:12,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-18 13:47:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52359248] [2024-11-18 13:47:12,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:47:12,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 13:47:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 13:47:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-18 13:47:12,506 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-18 13:47:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:12,999 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2024-11-18 13:47:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 13:47:12,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 56 [2024-11-18 13:47:13,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:13,001 INFO L225 Difference]: With dead ends: 131 [2024-11-18 13:47:13,001 INFO L226 Difference]: Without dead ends: 108 [2024-11-18 13:47:13,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-18 13:47:13,002 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:13,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 177 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 13:47:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-18 13:47:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2024-11-18 13:47:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.21875) internal successors, (78), 69 states have internal predecessors, (78), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-18 13:47:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2024-11-18 13:47:13,023 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 56 [2024-11-18 13:47:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:13,023 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2024-11-18 13:47:13,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-18 13:47:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2024-11-18 13:47:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-18 13:47:13,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:13,025 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:13,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-18 13:47:13,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:13,226 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:13,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2024-11-18 13:47:13,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:13,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516191873] [2024-11-18 13:47:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:13,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:47:13,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518693] [2024-11-18 13:47:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:13,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:13,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:13,245 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:13,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 13:47:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:13,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-18 13:47:13,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-18 13:47:13,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-18 13:47:13,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:13,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516191873] [2024-11-18 13:47:13,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:47:13,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518693] [2024-11-18 13:47:13,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:47:13,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:47:13,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-18 13:47:13,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413462968] [2024-11-18 13:47:13,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:47:13,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 13:47:13,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:13,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 13:47:13,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-18 13:47:13,888 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-18 13:47:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:14,341 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2024-11-18 13:47:14,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 13:47:14,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 67 [2024-11-18 13:47:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:14,344 INFO L225 Difference]: With dead ends: 161 [2024-11-18 13:47:14,345 INFO L226 Difference]: Without dead ends: 129 [2024-11-18 13:47:14,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-18 13:47:14,347 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:14,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 166 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 13:47:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-18 13:47:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2024-11-18 13:47:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 68 states have internal predecessors, (74), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-18 13:47:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2024-11-18 13:47:14,374 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 67 [2024-11-18 13:47:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:14,376 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2024-11-18 13:47:14,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-18 13:47:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2024-11-18 13:47:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-18 13:47:14,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:14,379 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:14,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 13:47:14,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:14,581 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:14,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1947386788, now seen corresponding path program 1 times [2024-11-18 13:47:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:14,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082773590] [2024-11-18 13:47:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-18 13:47:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:14,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082773590] [2024-11-18 13:47:14,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082773590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:47:14,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934310393] [2024-11-18 13:47:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:14,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:14,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:14,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:14,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 13:47:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:14,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 13:47:14,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-18 13:47:14,893 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 13:47:14,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934310393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:47:14,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 13:47:14,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-18 13:47:14,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762710521] [2024-11-18 13:47:14,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:47:14,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:47:14,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:14,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:47:14,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-18 13:47:14,895 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-18 13:47:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:14,956 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2024-11-18 13:47:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:47:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2024-11-18 13:47:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:14,957 INFO L225 Difference]: With dead ends: 140 [2024-11-18 13:47:14,957 INFO L226 Difference]: Without dead ends: 96 [2024-11-18 13:47:14,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-18 13:47:14,958 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:14,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 79 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:47:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-18 13:47:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2024-11-18 13:47:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-18 13:47:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2024-11-18 13:47:14,991 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 72 [2024-11-18 13:47:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:14,991 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2024-11-18 13:47:14,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-18 13:47:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2024-11-18 13:47:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-18 13:47:14,992 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:14,992 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:15,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 13:47:15,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:15,193 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:15,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1728532070, now seen corresponding path program 1 times [2024-11-18 13:47:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:15,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267859483] [2024-11-18 13:47:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:15,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-18 13:47:15,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:15,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267859483] [2024-11-18 13:47:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267859483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:47:15,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865885491] [2024-11-18 13:47:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:15,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:15,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:15,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:15,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 13:47:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:15,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-18 13:47:15,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-18 13:47:15,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-18 13:47:15,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865885491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:47:15,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:47:15,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-18 13:47:15,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148323933] [2024-11-18 13:47:15,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:47:15,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 13:47:15,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:15,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 13:47:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-18 13:47:15,859 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-18 13:47:15,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:15,993 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2024-11-18 13:47:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 13:47:15,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 72 [2024-11-18 13:47:15,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:15,995 INFO L225 Difference]: With dead ends: 110 [2024-11-18 13:47:15,995 INFO L226 Difference]: Without dead ends: 79 [2024-11-18 13:47:15,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-18 13:47:15,996 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:15,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 177 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:47:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-18 13:47:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-18 13:47:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-18 13:47:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2024-11-18 13:47:16,012 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 72 [2024-11-18 13:47:16,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:16,012 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2024-11-18 13:47:16,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-18 13:47:16,012 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2024-11-18 13:47:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-18 13:47:16,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:16,013 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:16,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-18 13:47:16,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:16,218 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:16,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:16,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2024-11-18 13:47:16,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:16,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071314229] [2024-11-18 13:47:16,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:47:16,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:16,236 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:47:16,237 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:47:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-18 13:47:16,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:16,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071314229] [2024-11-18 13:47:16,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071314229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:47:16,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593865138] [2024-11-18 13:47:16,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:47:16,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:16,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:16,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:16,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 13:47:16,513 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:47:16,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:47:16,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-18 13:47:16,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-18 13:47:16,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-18 13:47:17,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593865138] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:47:17,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:47:17,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-11-18 13:47:17,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988857582] [2024-11-18 13:47:17,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:47:17,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 13:47:17,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 13:47:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-18 13:47:17,237 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-11-18 13:47:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:17,436 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2024-11-18 13:47:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 13:47:17,436 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) Word has length 86 [2024-11-18 13:47:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:17,437 INFO L225 Difference]: With dead ends: 126 [2024-11-18 13:47:17,437 INFO L226 Difference]: Without dead ends: 77 [2024-11-18 13:47:17,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2024-11-18 13:47:17,438 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:17,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 308 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:47:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-18 13:47:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-18 13:47:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-18 13:47:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2024-11-18 13:47:17,451 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 86 [2024-11-18 13:47:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:17,451 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2024-11-18 13:47:17,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-11-18 13:47:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2024-11-18 13:47:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-18 13:47:17,452 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:17,452 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:17,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 13:47:17,656 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,SelfDestructingSolverStorable11 [2024-11-18 13:47:17,657 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:17,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:17,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1373298297, now seen corresponding path program 1 times [2024-11-18 13:47:17,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:17,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691896302] [2024-11-18 13:47:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:17,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:47:17,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644121724] [2024-11-18 13:47:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:17,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:17,677 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:17,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 13:47:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:17,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-18 13:47:17,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-11-18 13:47:17,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-11-18 13:47:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691896302] [2024-11-18 13:47:28,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:47:28,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644121724] [2024-11-18 13:47:28,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644121724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:47:28,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:47:28,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2024-11-18 13:47:28,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006074466] [2024-11-18 13:47:28,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 13:47:28,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 13:47:28,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 13:47:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-18 13:47:28,814 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-18 13:47:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:28,973 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2024-11-18 13:47:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 13:47:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 91 [2024-11-18 13:47:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:28,974 INFO L225 Difference]: With dead ends: 87 [2024-11-18 13:47:28,974 INFO L226 Difference]: Without dead ends: 85 [2024-11-18 13:47:28,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-18 13:47:28,975 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:28,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 246 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:47:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-18 13:47:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-18 13:47:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-18 13:47:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2024-11-18 13:47:28,987 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 91 [2024-11-18 13:47:28,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:28,987 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2024-11-18 13:47:28,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-18 13:47:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2024-11-18 13:47:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-18 13:47:28,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:28,987 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:29,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 13:47:29,188 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,SelfDestructingSolverStorable12 [2024-11-18 13:47:29,188 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:29,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:29,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1231859808, now seen corresponding path program 1 times [2024-11-18 13:47:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:29,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267222889] [2024-11-18 13:47:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 13:47:29,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434003507] [2024-11-18 13:47:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:29,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:29,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:29,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:29,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 13:47:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:29,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-18 13:47:29,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-18 13:47:29,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:30,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:30,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267222889] [2024-11-18 13:47:30,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 13:47:30,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434003507] [2024-11-18 13:47:30,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434003507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:47:30,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 13:47:30,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-18 13:47:30,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921694870] [2024-11-18 13:47:30,106 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 13:47:30,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 13:47:30,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 13:47:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-11-18 13:47:30,107 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-18 13:47:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:30,291 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2024-11-18 13:47:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 13:47:30,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2024-11-18 13:47:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:30,292 INFO L225 Difference]: With dead ends: 91 [2024-11-18 13:47:30,295 INFO L226 Difference]: Without dead ends: 87 [2024-11-18 13:47:30,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-11-18 13:47:30,296 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:30,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 290 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 13:47:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-18 13:47:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-18 13:47:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.0) internal successors, (57), 57 states have internal predecessors, (57), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-18 13:47:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2024-11-18 13:47:30,309 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 97 [2024-11-18 13:47:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:30,309 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2024-11-18 13:47:30,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-18 13:47:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2024-11-18 13:47:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-18 13:47:30,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:47:30,310 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:30,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-18 13:47:30,511 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,SelfDestructingSolverStorable13 [2024-11-18 13:47:30,511 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:47:30,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:47:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash -930866627, now seen corresponding path program 1 times [2024-11-18 13:47:30,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:47:30,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298430064] [2024-11-18 13:47:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:30,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:47:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-18 13:47:30,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:47:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298430064] [2024-11-18 13:47:30,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298430064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:47:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421952285] [2024-11-18 13:47:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:47:30,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:47:30,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:47:30,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:47:30,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 13:47:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:47:30,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-18 13:47:30,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:47:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-18 13:47:31,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:47:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-18 13:47:32,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421952285] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:47:32,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:47:32,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 30 [2024-11-18 13:47:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115638148] [2024-11-18 13:47:32,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:47:32,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-18 13:47:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:47:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-18 13:47:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2024-11-18 13:47:32,536 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) [2024-11-18 13:47:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:47:32,794 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2024-11-18 13:47:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 13:47:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) Word has length 102 [2024-11-18 13:47:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:47:32,795 INFO L225 Difference]: With dead ends: 91 [2024-11-18 13:47:32,795 INFO L226 Difference]: Without dead ends: 0 [2024-11-18 13:47:32,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 13:47:32,796 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 13:47:32,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 337 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 13:47:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-18 13:47:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-18 13:47:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:47:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-18 13:47:32,797 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2024-11-18 13:47:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:47:32,797 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-18 13:47:32,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) [2024-11-18 13:47:32,797 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-18 13:47:32,797 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-18 13:47:32,799 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-18 13:47:32,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-18 13:47:33,000 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,SelfDestructingSolverStorable14 [2024-11-18 13:47:33,003 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:47:33,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-18 13:47:33,583 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-18 13:47:33,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:47:33 BoogieIcfgContainer [2024-11-18 13:47:33,600 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-18 13:47:33,600 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-18 13:47:33,601 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-18 13:47:33,601 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-18 13:47:33,601 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:47:07" (3/4) ... [2024-11-18 13:47:33,603 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-18 13:47:33,606 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-18 13:47:33,608 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-18 13:47:33,608 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-18 13:47:33,608 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-18 13:47:33,609 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-18 13:47:33,609 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-18 13:47:33,670 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-18 13:47:33,671 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-18 13:47:33,673 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-18 13:47:33,674 INFO L158 Benchmark]: Toolchain (without parser) took 26606.52ms. Allocated memory was 148.9MB in the beginning and 239.1MB in the end (delta: 90.2MB). Free memory was 117.7MB in the beginning and 163.0MB in the end (delta: -45.3MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2024-11-18 13:47:33,674 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 121.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-18 13:47:33,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.75ms. Allocated memory is still 148.9MB. Free memory was 117.7MB in the beginning and 104.0MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-18 13:47:33,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.68ms. Allocated memory is still 148.9MB. Free memory was 104.0MB in the beginning and 102.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-18 13:47:33,675 INFO L158 Benchmark]: Boogie Preprocessor took 27.53ms. Allocated memory is still 148.9MB. Free memory was 102.5MB in the beginning and 101.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-18 13:47:33,675 INFO L158 Benchmark]: RCFGBuilder took 267.08ms. Allocated memory is still 148.9MB. Free memory was 101.0MB in the beginning and 89.0MB in the end (delta: 12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-18 13:47:33,675 INFO L158 Benchmark]: TraceAbstraction took 25999.23ms. Allocated memory was 148.9MB in the beginning and 239.1MB in the end (delta: 90.2MB). Free memory was 88.4MB in the beginning and 167.2MB in the end (delta: -78.8MB). Peak memory consumption was 111.4MB. Max. memory is 16.1GB. [2024-11-18 13:47:33,675 INFO L158 Benchmark]: Witness Printer took 72.91ms. Allocated memory is still 239.1MB. Free memory was 167.2MB in the beginning and 163.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-18 13:47:33,676 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 121.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.75ms. Allocated memory is still 148.9MB. Free memory was 117.7MB in the beginning and 104.0MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.68ms. Allocated memory is still 148.9MB. Free memory was 104.0MB in the beginning and 102.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.53ms. Allocated memory is still 148.9MB. Free memory was 102.5MB in the beginning and 101.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 267.08ms. Allocated memory is still 148.9MB. Free memory was 101.0MB in the beginning and 89.0MB in the end (delta: 12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 25999.23ms. Allocated memory was 148.9MB in the beginning and 239.1MB in the end (delta: 90.2MB). Free memory was 88.4MB in the beginning and 167.2MB in the end (delta: -78.8MB). Peak memory consumption was 111.4MB. Max. memory is 16.1GB. * Witness Printer took 72.91ms. Allocated memory is still 239.1MB. Free memory was 167.2MB in the beginning and 163.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.4s, OverallIterations: 15, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 190 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 153 mSDsluCounter, 2320 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1876 mSDsCounter, 219 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1840 IncrementalHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 219 mSolverCounterUnsat, 444 mSDtfsCounter, 1840 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1353 GetRequests, 1168 SyntacticMatches, 10 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=8, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 18.4s InterpolantComputationTime, 1522 NumberOfCodeBlocks, 1522 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1639 ConstructedInterpolants, 0 QuantifiedInterpolants, 18173 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1898 ConjunctsInSsa, 273 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 5680/6189 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((((((((((d == 1) && (p == 1)) && (q == 1)) && (((long long) r + 1) == A)) && (B == 1)) || (((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (B == 1))) || ((((((2 == A) && (2 == p)) && (r == 0)) && (2 == q)) && (B == 1)) && (2 == d))) || ((((((d == 1) && (p == 1)) && (2 == A)) && (r == 0)) && (2 == q)) && (B == 1))) || ((((((p == 4) && (2 == A)) && (q == 0)) && (d == 4)) && (2 == r)) && (B == 1))) || ((((((2 == p) && (q == 0)) && (A == r)) && (1 <= r)) && (B == 1)) && (2 == d))) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((((2 == p) && (q == 0)) && (A <= 2)) && (A == r)) && (1 <= r)) && (B == 1)) && (2 == d)) || (((((((d == 1) && (p == 1)) && (q == 0)) && (A <= 2)) && (A == r)) && (B == 1)) && (0 <= A))) || ((((((p == 4) && (2 == A)) && (q == 0)) && (d == 4)) && (2 == r)) && (B == 1))) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-11-18 13:47:33,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE