./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.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 83a507b5a78977c4a0b48a152de77bd7eabcfca9b19b757436d28082e86741ee --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 02:29:17,084 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 02:29:17,124 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 02:29:17,128 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 02:29:17,130 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 02:29:17,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 02:29:17,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 02:29:17,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 02:29:17,172 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 02:29:17,174 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 02:29:17,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 02:29:17,174 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 02:29:17,174 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 02:29:17,176 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 02:29:17,176 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 02:29:17,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 02:29:17,177 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 02:29:17,177 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 02:29:17,177 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 02:29:17,177 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 02:29:17,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 02:29:17,178 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 02:29:17,178 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 02:29:17,178 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 02:29:17,180 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 02:29:17,180 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 02:29:17,181 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 02:29:17,181 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 02:29:17,181 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 02:29:17,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 02:29:17,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 02:29:17,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 02:29:17,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:29:17,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 02:29:17,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 02:29:17,182 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 02:29:17,182 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 02:29:17,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 02:29:17,182 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 02:29:17,183 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 02:29:17,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 02:29:17,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 02:29:17,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83a507b5a78977c4a0b48a152de77bd7eabcfca9b19b757436d28082e86741ee [2024-10-14 02:29:17,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 02:29:17,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 02:29:17,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 02:29:17,413 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 02:29:17,414 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 02:29:17,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c [2024-10-14 02:29:18,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 02:29:18,742 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 02:29:18,743 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c [2024-10-14 02:29:18,752 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/842a331c8/48ad9ed06c7d40f2a4ae3713d336e644/FLAG15a9e03cb [2024-10-14 02:29:18,763 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/842a331c8/48ad9ed06c7d40f2a4ae3713d336e644 [2024-10-14 02:29:18,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 02:29:18,768 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 02:29:18,770 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 02:29:18,771 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 02:29:18,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 02:29:18,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:18,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2142eea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18, skipping insertion in model container [2024-10-14 02:29:18,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:18,795 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 02:29:18,925 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c[537,550] [2024-10-14 02:29:18,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:29:18,958 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 02:29:18,966 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c[537,550] [2024-10-14 02:29:18,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:29:18,989 INFO L204 MainTranslator]: Completed translation [2024-10-14 02:29:18,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18 WrapperNode [2024-10-14 02:29:18,989 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 02:29:18,990 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 02:29:18,990 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 02:29:18,990 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 02:29:18,996 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,002 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,015 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-10-14 02:29:19,016 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 02:29:19,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 02:29:19,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 02:29:19,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 02:29:19,025 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,031 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,044 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-14 02:29:19,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,050 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,054 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,055 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 02:29:19,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 02:29:19,056 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 02:29:19,056 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 02:29:19,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (1/1) ... [2024-10-14 02:29:19,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:29:19,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:29:19,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 02:29:19,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 02:29:19,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 02:29:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-14 02:29:19,122 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-14 02:29:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 02:29:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 02:29:19,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 02:29:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 02:29:19,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 02:29:19,176 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 02:29:19,177 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 02:29:19,278 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-14 02:29:19,279 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 02:29:19,301 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 02:29:19,302 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 02:29:19,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:29:19 BoogieIcfgContainer [2024-10-14 02:29:19,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 02:29:19,304 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 02:29:19,304 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 02:29:19,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 02:29:19,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:29:18" (1/3) ... [2024-10-14 02:29:19,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7ef770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:29:19, skipping insertion in model container [2024-10-14 02:29:19,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:29:18" (2/3) ... [2024-10-14 02:29:19,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7ef770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:29:19, skipping insertion in model container [2024-10-14 02:29:19,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:29:19" (3/3) ... [2024-10-14 02:29:19,308 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2024-10-14 02:29:19,320 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 02:29:19,320 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 02:29:19,371 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 02:29:19,378 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;@61d82bcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 02:29:19,378 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 02:29:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 02:29:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 02:29:19,391 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:29:19,392 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:29:19,392 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:29:19,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:29:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash 760957734, now seen corresponding path program 1 times [2024-10-14 02:29:19,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:29:19,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050838566] [2024-10-14 02:29:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:19,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:29:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:19,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:29:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:19,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 02:29:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:19,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-14 02:29:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 02:29:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:29:19,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050838566] [2024-10-14 02:29:19,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050838566] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:29:19,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:29:19,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 02:29:19,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088557848] [2024-10-14 02:29:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:29:19,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 02:29:19,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:29:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 02:29:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:29:19,590 INFO L87 Difference]: Start difference. First operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 02:29:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:29:19,622 INFO L93 Difference]: Finished difference Result 58 states and 99 transitions. [2024-10-14 02:29:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 02:29:19,624 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-10-14 02:29:19,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:29:19,629 INFO L225 Difference]: With dead ends: 58 [2024-10-14 02:29:19,630 INFO L226 Difference]: Without dead ends: 28 [2024-10-14 02:29:19,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:29:19,637 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:29:19,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:29:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-14 02:29:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-14 02:29:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-14 02:29:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2024-10-14 02:29:19,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 23 [2024-10-14 02:29:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:29:19,674 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2024-10-14 02:29:19,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 02:29:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2024-10-14 02:29:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 02:29:19,676 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:29:19,676 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:29:19,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 02:29:19,676 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:29:19,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:29:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash -387749596, now seen corresponding path program 1 times [2024-10-14 02:29:19,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:29:19,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671399210] [2024-10-14 02:29:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:29:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:19,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:29:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:19,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 02:29:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:19,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-14 02:29:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 02:29:19,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:29:19,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671399210] [2024-10-14 02:29:19,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671399210] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:29:19,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:29:19,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:29:19,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111653066] [2024-10-14 02:29:19,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:29:19,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:29:19,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:29:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:29:19,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:29:19,955 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 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) [2024-10-14 02:29:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:29:20,013 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2024-10-14 02:29:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:29:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 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 23 [2024-10-14 02:29:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:29:20,016 INFO L225 Difference]: With dead ends: 41 [2024-10-14 02:29:20,016 INFO L226 Difference]: Without dead ends: 39 [2024-10-14 02:29:20,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:29:20,017 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:29:20,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 119 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:29:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-14 02:29:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2024-10-14 02:29:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-14 02:29:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-10-14 02:29:20,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2024-10-14 02:29:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:29:20,032 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-10-14 02:29:20,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 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) [2024-10-14 02:29:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-10-14 02:29:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 02:29:20,034 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:29:20,034 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:29:20,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 02:29:20,035 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:29:20,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:29:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1391236353, now seen corresponding path program 1 times [2024-10-14 02:29:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:29:20,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456403267] [2024-10-14 02:29:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:29:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:20,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:29:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:20,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 02:29:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:20,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-14 02:29:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:20,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 02:29:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 02:29:20,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:29:20,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456403267] [2024-10-14 02:29:20,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456403267] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:29:20,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:29:20,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:29:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159629752] [2024-10-14 02:29:20,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:29:20,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:29:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:29:20,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:29:20,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:29:20,397 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 02:29:20,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:29:20,488 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2024-10-14 02:29:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:29:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-10-14 02:29:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:29:20,490 INFO L225 Difference]: With dead ends: 45 [2024-10-14 02:29:20,490 INFO L226 Difference]: Without dead ends: 43 [2024-10-14 02:29:20,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:29:20,491 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:29:20,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:29:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-14 02:29:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-10-14 02:29:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-14 02:29:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2024-10-14 02:29:20,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 28 [2024-10-14 02:29:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:29:20,499 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2024-10-14 02:29:20,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 02:29:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2024-10-14 02:29:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-14 02:29:20,500 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:29:20,500 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:29:20,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 02:29:20,501 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:29:20,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:29:20,501 INFO L85 PathProgramCache]: Analyzing trace with hash 831418820, now seen corresponding path program 1 times [2024-10-14 02:29:20,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:29:20,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144817056] [2024-10-14 02:29:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:20,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:29:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:29:20,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929703227] [2024-10-14 02:29:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:20,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:29:20,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:29:20,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:29:20,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 02:29:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:20,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 02:29:20,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:29:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 02:29:20,771 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:29:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:29:20,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144817056] [2024-10-14 02:29:20,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:29:20,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929703227] [2024-10-14 02:29:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929703227] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:29:20,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:29:20,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 02:29:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543241049] [2024-10-14 02:29:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:29:20,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 02:29:20,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:29:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 02:29:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-14 02:29:20,775 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-14 02:29:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:29:20,951 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-10-14 02:29:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 02:29:20,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2024-10-14 02:29:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:29:20,953 INFO L225 Difference]: With dead ends: 62 [2024-10-14 02:29:20,954 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 02:29:20,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-14 02:29:20,956 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:29:20,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 139 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:29:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 02:29:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-14 02:29:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-14 02:29:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2024-10-14 02:29:20,974 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 33 [2024-10-14 02:29:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:29:20,975 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2024-10-14 02:29:20,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-14 02:29:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2024-10-14 02:29:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 02:29:20,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:29:20,976 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:29:20,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 02:29:21,182 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 [2024-10-14 02:29:21,183 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:29:21,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:29:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1016562388, now seen corresponding path program 1 times [2024-10-14 02:29:21,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:29:21,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418868892] [2024-10-14 02:29:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:29:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:29:21,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49122592] [2024-10-14 02:29:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:21,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:29:21,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:29:21,205 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:29:21,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 02:29:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:21,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 02:29:21,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:29:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 02:29:21,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:29:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-14 02:29:22,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:29:22,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418868892] [2024-10-14 02:29:22,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:29:22,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49122592] [2024-10-14 02:29:22,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49122592] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:29:22,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:29:22,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-10-14 02:29:22,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87007083] [2024-10-14 02:29:22,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:29:22,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 02:29:22,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:29:22,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 02:29:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-14 02:29:22,220 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-14 02:29:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:29:22,636 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2024-10-14 02:29:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 02:29:22,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 40 [2024-10-14 02:29:22,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:29:22,639 INFO L225 Difference]: With dead ends: 67 [2024-10-14 02:29:22,639 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 02:29:22,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-10-14 02:29:22,640 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 02:29:22,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 02:29:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 02:29:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-14 02:29:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-14 02:29:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2024-10-14 02:29:22,652 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 40 [2024-10-14 02:29:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:29:22,652 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2024-10-14 02:29:22,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-14 02:29:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2024-10-14 02:29:22,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-14 02:29:22,653 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:29:22,653 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:29:22,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 02:29:22,857 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 [2024-10-14 02:29:22,858 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:29:22,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:29:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1147651331, now seen corresponding path program 1 times [2024-10-14 02:29:22,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:29:22,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544822174] [2024-10-14 02:29:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:22,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:29:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:29:22,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639726065] [2024-10-14 02:29:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:22,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:29:22,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:29:22,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:29:22,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 02:29:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:22,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:29:22,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:29:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-14 02:29:23,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:29:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-14 02:29:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:29:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544822174] [2024-10-14 02:29:23,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:29:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639726065] [2024-10-14 02:29:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639726065] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 02:29:23,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 02:29:23,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-10-14 02:29:23,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357862419] [2024-10-14 02:29:23,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:29:23,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 02:29:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:29:23,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 02:29:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:29:23,110 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-14 02:29:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:29:23,912 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-10-14 02:29:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:29:23,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2024-10-14 02:29:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:29:23,914 INFO L225 Difference]: With dead ends: 69 [2024-10-14 02:29:23,914 INFO L226 Difference]: Without dead ends: 67 [2024-10-14 02:29:23,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-14 02:29:23,915 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 02:29:23,915 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-14 02:29:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-14 02:29:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-10-14 02:29:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.1) internal successors, (44), 43 states have internal predecessors, (44), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-14 02:29:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2024-10-14 02:29:23,930 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 50 [2024-10-14 02:29:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:29:23,932 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2024-10-14 02:29:23,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-14 02:29:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2024-10-14 02:29:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-14 02:29:23,935 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:29:23,935 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:29:23,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 02:29:24,139 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 [2024-10-14 02:29:24,140 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:29:24,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:29:24,140 INFO L85 PathProgramCache]: Analyzing trace with hash 961839043, now seen corresponding path program 1 times [2024-10-14 02:29:24,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:29:24,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33619509] [2024-10-14 02:29:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:29:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:29:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 02:29:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-14 02:29:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 02:29:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-14 02:29:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,235 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-14 02:29:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-14 02:29:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:29:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-14 02:29:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-14 02:29:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-14 02:29:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-10-14 02:29:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:29:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33619509] [2024-10-14 02:29:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33619509] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:29:24,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845232112] [2024-10-14 02:29:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:24,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:29:24,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:29:24,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:29:24,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 02:29:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:24,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 02:29:24,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:29:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-14 02:29:24,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:29:24,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845232112] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:29:24,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:29:24,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2024-10-14 02:29:24,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364323236] [2024-10-14 02:29:24,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:29:24,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 02:29:24,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:29:24,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 02:29:24,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-14 02:29:24,466 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 6 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) [2024-10-14 02:29:24,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:29:24,616 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2024-10-14 02:29:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 02:29:24,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 6 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 68 [2024-10-14 02:29:24,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:29:24,617 INFO L225 Difference]: With dead ends: 98 [2024-10-14 02:29:24,618 INFO L226 Difference]: Without dead ends: 90 [2024-10-14 02:29:24,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-14 02:29:24,618 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:29:24,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 177 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:29:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-14 02:29:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-10-14 02:29:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 57 states have internal predecessors, (60), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-14 02:29:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-10-14 02:29:24,655 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 68 [2024-10-14 02:29:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:29:24,655 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-10-14 02:29:24,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 6 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) [2024-10-14 02:29:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-10-14 02:29:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-14 02:29:24,656 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:29:24,657 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:29:24,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 02:29:24,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:29:24,859 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:29:24,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:29:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1282123871, now seen corresponding path program 1 times [2024-10-14 02:29:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:29:24,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838270368] [2024-10-14 02:29:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:29:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:29:24,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828872840] [2024-10-14 02:29:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:29:24,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:29:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:29:24,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:29:24,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 02:29:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:29:25,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-14 02:29:25,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:29:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 43 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-14 02:29:26,149 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:30:03,194 WARN L286 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-14 02:30:47,638 WARN L286 SmtUtils]: Spent 22.96s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)