./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.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 f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 20:14:14,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 20:14:14,852 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 20:14:14,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 20:14:14,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 20:14:14,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 20:14:14,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 20:14:14,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 20:14:14,889 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 20:14:14,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 20:14:14,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 20:14:14,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 20:14:14,890 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 20:14:14,892 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 20:14:14,892 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 20:14:14,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 20:14:14,893 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 20:14:14,893 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 20:14:14,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 20:14:14,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 20:14:14,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 20:14:14,897 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 20:14:14,897 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 20:14:14,898 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 20:14:14,898 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 20:14:14,898 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 20:14:14,898 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 20:14:14,898 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 20:14:14,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 20:14:14,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 20:14:14,899 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 20:14:14,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 20:14:14,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 20:14:14,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 20:14:14,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 20:14:14,900 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 20:14:14,900 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 20:14:14,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 20:14:14,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 20:14:14,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 20:14:14,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 20:14:14,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 20:14:14,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 [2024-10-23 20:14:15,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 20:14:15,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 20:14:15,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 20:14:15,176 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 20:14:15,180 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 20:14:15,181 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2024-10-23 20:14:16,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 20:14:16,863 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 20:14:16,871 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2024-10-23 20:14:16,882 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afea2c016/4fe331a569ce4158b14a87865f236475/FLAGd7593dc45 [2024-10-23 20:14:16,892 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afea2c016/4fe331a569ce4158b14a87865f236475 [2024-10-23 20:14:16,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 20:14:16,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 20:14:16,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 20:14:16,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 20:14:16,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 20:14:16,900 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:14:16" (1/1) ... [2024-10-23 20:14:16,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332b5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:16, skipping insertion in model container [2024-10-23 20:14:16,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:14:16" (1/1) ... [2024-10-23 20:14:16,921 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 20:14:17,048 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/bitvector/soft_float_5a.c.cil.c[728,741] [2024-10-23 20:14:17,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 20:14:17,108 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 20:14:17,116 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/bitvector/soft_float_5a.c.cil.c[728,741] [2024-10-23 20:14:17,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 20:14:17,164 INFO L204 MainTranslator]: Completed translation [2024-10-23 20:14:17,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17 WrapperNode [2024-10-23 20:14:17,165 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 20:14:17,166 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 20:14:17,166 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 20:14:17,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 20:14:17,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,196 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2024-10-23 20:14:17,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 20:14:17,200 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 20:14:17,200 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 20:14:17,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 20:14:17,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,231 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]. [2024-10-23 20:14:17,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,231 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,246 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,247 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 20:14:17,248 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 20:14:17,248 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 20:14:17,248 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 20:14:17,249 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (1/1) ... [2024-10-23 20:14:17,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 20:14:17,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:17,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-23 20:14:17,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-23 20:14:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 20:14:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 20:14:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-10-23 20:14:17,313 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-10-23 20:14:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 20:14:17,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 20:14:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-23 20:14:17,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-23 20:14:17,372 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 20:14:17,375 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 20:14:17,705 INFO L? ?]: Removed 62 outVars from TransFormulas that were not future-live. [2024-10-23 20:14:17,709 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 20:14:17,730 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 20:14:17,732 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-23 20:14:17,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:14:17 BoogieIcfgContainer [2024-10-23 20:14:17,732 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 20:14:17,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 20:14:17,734 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 20:14:17,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 20:14:17,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:14:16" (1/3) ... [2024-10-23 20:14:17,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29647838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:14:17, skipping insertion in model container [2024-10-23 20:14:17,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:14:17" (2/3) ... [2024-10-23 20:14:17,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29647838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:14:17, skipping insertion in model container [2024-10-23 20:14:17,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:14:17" (3/3) ... [2024-10-23 20:14:17,739 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2024-10-23 20:14:17,753 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 20:14:17,753 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 20:14:17,805 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 20:14:17,810 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;@61bf708c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 20:14:17,811 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 20:14:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 63 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-23 20:14:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-23 20:14:17,821 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:17,822 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:17,823 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:17,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1677227923, now seen corresponding path program 1 times [2024-10-23 20:14:17,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:17,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867457011] [2024-10-23 20:14:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:17,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-23 20:14:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-23 20:14:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-23 20:14:18,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:18,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867457011] [2024-10-23 20:14:18,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867457011] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:18,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 20:14:18,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 20:14:18,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191329985] [2024-10-23 20:14:18,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:18,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 20:14:18,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:18,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 20:14:18,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 20:14:18,199 INFO L87 Difference]: Start difference. First operand has 70 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 63 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:18,272 INFO L93 Difference]: Finished difference Result 165 states and 259 transitions. [2024-10-23 20:14:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 20:14:18,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2024-10-23 20:14:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:18,285 INFO L225 Difference]: With dead ends: 165 [2024-10-23 20:14:18,285 INFO L226 Difference]: Without dead ends: 66 [2024-10-23 20:14:18,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 20:14:18,296 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 35 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:18,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 187 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-23 20:14:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-10-23 20:14:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-23 20:14:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2024-10-23 20:14:18,371 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 36 [2024-10-23 20:14:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:18,372 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2024-10-23 20:14:18,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2024-10-23 20:14:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-23 20:14:18,377 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:18,377 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:18,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 20:14:18,377 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:18,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1191999181, now seen corresponding path program 1 times [2024-10-23 20:14:18,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:18,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949514503] [2024-10-23 20:14:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:18,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-23 20:14:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-23 20:14:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-23 20:14:18,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:18,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949514503] [2024-10-23 20:14:18,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949514503] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:18,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 20:14:18,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-23 20:14:18,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696823808] [2024-10-23 20:14:18,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:18,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 20:14:18,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:18,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 20:14:18,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-23 20:14:18,668 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:18,717 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2024-10-23 20:14:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 20:14:18,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-10-23 20:14:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:18,719 INFO L225 Difference]: With dead ends: 102 [2024-10-23 20:14:18,719 INFO L226 Difference]: Without dead ends: 66 [2024-10-23 20:14:18,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-23 20:14:18,721 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 35 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:18,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 267 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-23 20:14:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-10-23 20:14:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-23 20:14:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2024-10-23 20:14:18,743 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 38 [2024-10-23 20:14:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:18,743 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2024-10-23 20:14:18,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2024-10-23 20:14:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-23 20:14:18,745 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:18,745 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:18,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 20:14:18,745 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:18,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash -933833743, now seen corresponding path program 1 times [2024-10-23 20:14:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135707576] [2024-10-23 20:14:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-23 20:14:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-23 20:14:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 20:14:18,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:18,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135707576] [2024-10-23 20:14:18,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135707576] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:18,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407751466] [2024-10-23 20:14:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:18,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:18,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:18,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 20:14:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:18,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-23 20:14:19,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-23 20:14:19,042 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 20:14:19,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407751466] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:19,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 20:14:19,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-23 20:14:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725183555] [2024-10-23 20:14:19,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:19,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 20:14:19,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:19,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 20:14:19,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-23 20:14:19,049 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:19,168 INFO L93 Difference]: Finished difference Result 149 states and 215 transitions. [2024-10-23 20:14:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-23 20:14:19,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-10-23 20:14:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:19,170 INFO L225 Difference]: With dead ends: 149 [2024-10-23 20:14:19,170 INFO L226 Difference]: Without dead ends: 85 [2024-10-23 20:14:19,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-23 20:14:19,172 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 20 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:19,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:14:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-23 20:14:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2024-10-23 20:14:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 states have internal predecessors, (99), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-23 20:14:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2024-10-23 20:14:19,181 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 38 [2024-10-23 20:14:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:19,181 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2024-10-23 20:14:19,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2024-10-23 20:14:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-23 20:14:19,184 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:19,184 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:19,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-23 20:14:19,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:19,387 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:19,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1211368501, now seen corresponding path program 1 times [2024-10-23 20:14:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:19,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975872407] [2024-10-23 20:14:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-23 20:14:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-23 20:14:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 20:14:19,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975872407] [2024-10-23 20:14:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975872407] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789066293] [2024-10-23 20:14:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:19,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:19,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:19,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:19,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 20:14:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 20:14:19,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-23 20:14:19,588 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 20:14:19,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789066293] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:19,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 20:14:19,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-23 20:14:19,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274540133] [2024-10-23 20:14:19,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:19,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 20:14:19,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 20:14:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-23 20:14:19,590 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:19,648 INFO L93 Difference]: Finished difference Result 163 states and 233 transitions. [2024-10-23 20:14:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 20:14:19,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-10-23 20:14:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:19,650 INFO L225 Difference]: With dead ends: 163 [2024-10-23 20:14:19,650 INFO L226 Difference]: Without dead ends: 91 [2024-10-23 20:14:19,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-23 20:14:19,651 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 14 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:19,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 218 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-23 20:14:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2024-10-23 20:14:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 74 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 116 transitions. [2024-10-23 20:14:19,658 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 116 transitions. Word has length 41 [2024-10-23 20:14:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:19,659 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 116 transitions. [2024-10-23 20:14:19,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 116 transitions. [2024-10-23 20:14:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-23 20:14:19,660 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:19,660 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:19,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-23 20:14:19,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-23 20:14:19,861 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:19,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:19,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2099165026, now seen corresponding path program 1 times [2024-10-23 20:14:19,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:19,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161424114] [2024-10-23 20:14:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:19,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-23 20:14:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 20:14:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 20:14:19,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161424114] [2024-10-23 20:14:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161424114] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542693700] [2024-10-23 20:14:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:19,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:19,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:19,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:19,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 20:14:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:20,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 20:14:20,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-23 20:14:20,129 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 20:14:20,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542693700] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:20,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 20:14:20,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-10-23 20:14:20,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59338081] [2024-10-23 20:14:20,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:20,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 20:14:20,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 20:14:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-23 20:14:20,136 INFO L87 Difference]: Start difference. First operand 82 states and 116 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:20,269 INFO L93 Difference]: Finished difference Result 168 states and 241 transitions. [2024-10-23 20:14:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 20:14:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-10-23 20:14:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:20,275 INFO L225 Difference]: With dead ends: 168 [2024-10-23 20:14:20,275 INFO L226 Difference]: Without dead ends: 92 [2024-10-23 20:14:20,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-23 20:14:20,278 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 15 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:20,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 218 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:14:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-23 20:14:20,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2024-10-23 20:14:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 75 states have internal predecessors, (105), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2024-10-23 20:14:20,304 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 42 [2024-10-23 20:14:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:20,305 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2024-10-23 20:14:20,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2024-10-23 20:14:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-23 20:14:20,306 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:20,306 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:20,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-23 20:14:20,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:20,507 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:20,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:20,508 INFO L85 PathProgramCache]: Analyzing trace with hash 582132291, now seen corresponding path program 1 times [2024-10-23 20:14:20,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:20,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74033367] [2024-10-23 20:14:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:20,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:20,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:20,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:20,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-23 20:14:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:20,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-23 20:14:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 20:14:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:20,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74033367] [2024-10-23 20:14:20,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74033367] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:20,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495182134] [2024-10-23 20:14:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:20,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:20,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:20,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 20:14:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:20,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 20:14:20,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-23 20:14:20,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:14:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 20:14:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495182134] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:14:20,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:14:20,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-23 20:14:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828304327] [2024-10-23 20:14:20,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:14:20,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-23 20:14:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-23 20:14:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-23 20:14:20,859 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-23 20:14:20,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:20,970 INFO L93 Difference]: Finished difference Result 215 states and 316 transitions. [2024-10-23 20:14:20,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 20:14:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 44 [2024-10-23 20:14:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:20,972 INFO L225 Difference]: With dead ends: 215 [2024-10-23 20:14:20,972 INFO L226 Difference]: Without dead ends: 138 [2024-10-23 20:14:20,972 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-23 20:14:20,973 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 94 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:20,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 447 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:14:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-23 20:14:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2024-10-23 20:14:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.4545454545454546) internal successors, (128), 89 states have internal predecessors, (128), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 141 transitions. [2024-10-23 20:14:20,980 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 141 transitions. Word has length 44 [2024-10-23 20:14:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:20,980 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 141 transitions. [2024-10-23 20:14:20,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-23 20:14:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 141 transitions. [2024-10-23 20:14:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-23 20:14:20,981 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:20,982 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:20,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-23 20:14:21,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:21,182 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:21,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:21,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2064950367, now seen corresponding path program 1 times [2024-10-23 20:14:21,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:21,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867151529] [2024-10-23 20:14:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 20:14:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-23 20:14:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 20:14:21,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:21,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867151529] [2024-10-23 20:14:21,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867151529] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:21,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132212957] [2024-10-23 20:14:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:21,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:21,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:21,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 20:14:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 20:14:21,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-23 20:14:21,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:14:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 20:14:21,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132212957] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:14:21,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:14:21,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-23 20:14:21,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134610639] [2024-10-23 20:14:21,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:14:21,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-23 20:14:21,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:21,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-23 20:14:21,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-23 20:14:21,412 INFO L87 Difference]: Start difference. First operand 97 states and 141 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-23 20:14:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:21,505 INFO L93 Difference]: Finished difference Result 235 states and 349 transitions. [2024-10-23 20:14:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 20:14:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2024-10-23 20:14:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:21,507 INFO L225 Difference]: With dead ends: 235 [2024-10-23 20:14:21,507 INFO L226 Difference]: Without dead ends: 144 [2024-10-23 20:14:21,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-23 20:14:21,509 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 132 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:21,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 299 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:14:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-23 20:14:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 106. [2024-10-23 20:14:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.4742268041237114) internal successors, (143), 98 states have internal predecessors, (143), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 156 transitions. [2024-10-23 20:14:21,531 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 156 transitions. Word has length 45 [2024-10-23 20:14:21,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:21,531 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 156 transitions. [2024-10-23 20:14:21,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-23 20:14:21,532 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 156 transitions. [2024-10-23 20:14:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-23 20:14:21,532 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:21,533 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:21,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 20:14:21,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:21,733 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:21,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash -959214855, now seen corresponding path program 1 times [2024-10-23 20:14:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:21,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392012255] [2024-10-23 20:14:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:21,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-23 20:14:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 20:14:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:21,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:21,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392012255] [2024-10-23 20:14:21,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392012255] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:21,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900804654] [2024-10-23 20:14:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:21,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:21,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:21,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:21,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 20:14:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:21,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-23 20:14:21,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 20:14:21,888 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 20:14:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900804654] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:21,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 20:14:21,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-10-23 20:14:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857968946] [2024-10-23 20:14:21,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:21,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 20:14:21,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 20:14:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 20:14:21,889 INFO L87 Difference]: Start difference. First operand 106 states and 156 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:21,919 INFO L93 Difference]: Finished difference Result 213 states and 321 transitions. [2024-10-23 20:14:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 20:14:21,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-10-23 20:14:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:21,920 INFO L225 Difference]: With dead ends: 213 [2024-10-23 20:14:21,920 INFO L226 Difference]: Without dead ends: 113 [2024-10-23 20:14:21,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 20:14:21,921 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:21,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-23 20:14:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2024-10-23 20:14:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.4646464646464648) internal successors, (145), 100 states have internal predecessors, (145), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 158 transitions. [2024-10-23 20:14:21,928 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 158 transitions. Word has length 46 [2024-10-23 20:14:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:21,928 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 158 transitions. [2024-10-23 20:14:21,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 158 transitions. [2024-10-23 20:14:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-23 20:14:21,929 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:21,929 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:21,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-23 20:14:22,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:22,130 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:22,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1941600533, now seen corresponding path program 1 times [2024-10-23 20:14:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:22,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503056124] [2024-10-23 20:14:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-23 20:14:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 20:14:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:22,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:22,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503056124] [2024-10-23 20:14:22,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503056124] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:22,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288275666] [2024-10-23 20:14:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:22,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:22,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:22,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:22,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 20:14:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-23 20:14:22,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 20:14:22,216 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 20:14:22,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288275666] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:22,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 20:14:22,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-10-23 20:14:22,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35192912] [2024-10-23 20:14:22,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:22,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 20:14:22,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 20:14:22,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 20:14:22,217 INFO L87 Difference]: Start difference. First operand 108 states and 158 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:22,248 INFO L93 Difference]: Finished difference Result 211 states and 315 transitions. [2024-10-23 20:14:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 20:14:22,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-10-23 20:14:22,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:22,250 INFO L225 Difference]: With dead ends: 211 [2024-10-23 20:14:22,250 INFO L226 Difference]: Without dead ends: 109 [2024-10-23 20:14:22,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 20:14:22,250 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:22,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 157 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-23 20:14:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2024-10-23 20:14:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 95 states have (on average 1.4421052631578948) internal successors, (137), 96 states have internal predecessors, (137), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 150 transitions. [2024-10-23 20:14:22,259 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 150 transitions. Word has length 46 [2024-10-23 20:14:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:22,259 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 150 transitions. [2024-10-23 20:14:22,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 150 transitions. [2024-10-23 20:14:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-23 20:14:22,260 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:22,260 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:22,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-23 20:14:22,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:22,465 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:22,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:22,465 INFO L85 PathProgramCache]: Analyzing trace with hash -277388424, now seen corresponding path program 1 times [2024-10-23 20:14:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:22,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216490035] [2024-10-23 20:14:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-23 20:14:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-23 20:14:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 20:14:22,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216490035] [2024-10-23 20:14:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216490035] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307594519] [2024-10-23 20:14:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:22,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:22,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:22,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:22,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 20:14:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:22,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-23 20:14:22,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:22,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:14:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:22,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307594519] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:14:22,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:14:22,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-10-23 20:14:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918634002] [2024-10-23 20:14:22,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:14:22,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-23 20:14:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-23 20:14:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-10-23 20:14:22,711 INFO L87 Difference]: Start difference. First operand 104 states and 150 transitions. Second operand has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-23 20:14:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:22,881 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2024-10-23 20:14:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-23 20:14:22,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 47 [2024-10-23 20:14:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:22,883 INFO L225 Difference]: With dead ends: 218 [2024-10-23 20:14:22,883 INFO L226 Difference]: Without dead ends: 120 [2024-10-23 20:14:22,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-10-23 20:14:22,884 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 100 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:22,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 487 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:14:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-23 20:14:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2024-10-23 20:14:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.4) internal successors, (119), 86 states have internal predecessors, (119), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 132 transitions. [2024-10-23 20:14:22,891 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 132 transitions. Word has length 47 [2024-10-23 20:14:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:22,891 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 132 transitions. [2024-10-23 20:14:22,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-23 20:14:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 132 transitions. [2024-10-23 20:14:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-23 20:14:22,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:22,892 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:22,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-23 20:14:23,093 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,SelfDestructingSolverStorable9 [2024-10-23 20:14:23,093 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:23,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash 911938789, now seen corresponding path program 1 times [2024-10-23 20:14:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:23,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148547171] [2024-10-23 20:14:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-23 20:14:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-23 20:14:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148547171] [2024-10-23 20:14:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148547171] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685756540] [2024-10-23 20:14:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:23,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:23,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:23,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:23,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 20:14:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 20:14:23,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 20:14:23,253 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 20:14:23,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685756540] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:23,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 20:14:23,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-23 20:14:23,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665452632] [2024-10-23 20:14:23,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:23,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 20:14:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 20:14:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-23 20:14:23,255 INFO L87 Difference]: Start difference. First operand 94 states and 132 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:23,287 INFO L93 Difference]: Finished difference Result 186 states and 266 transitions. [2024-10-23 20:14:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 20:14:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-10-23 20:14:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:23,288 INFO L225 Difference]: With dead ends: 186 [2024-10-23 20:14:23,288 INFO L226 Difference]: Without dead ends: 98 [2024-10-23 20:14:23,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-23 20:14:23,289 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:23,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 162 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-23 20:14:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2024-10-23 20:14:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.388235294117647) internal successors, (118), 86 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 131 transitions. [2024-10-23 20:14:23,294 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 131 transitions. Word has length 49 [2024-10-23 20:14:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:23,294 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 131 transitions. [2024-10-23 20:14:23,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 131 transitions. [2024-10-23 20:14:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-23 20:14:23,295 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:23,295 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:23,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-23 20:14:23,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:23,496 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:23,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash 600471768, now seen corresponding path program 1 times [2024-10-23 20:14:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:23,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468687541] [2024-10-23 20:14:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:23,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 20:14:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 20:14:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-23 20:14:23,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:23,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468687541] [2024-10-23 20:14:23,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468687541] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:23,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 20:14:23,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-23 20:14:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440979434] [2024-10-23 20:14:23,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:23,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-23 20:14:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-23 20:14:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-23 20:14:23,619 INFO L87 Difference]: Start difference. First operand 94 states and 131 transitions. Second operand has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:23,669 INFO L93 Difference]: Finished difference Result 145 states and 204 transitions. [2024-10-23 20:14:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-23 20:14:23,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-23 20:14:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:23,670 INFO L225 Difference]: With dead ends: 145 [2024-10-23 20:14:23,671 INFO L226 Difference]: Without dead ends: 112 [2024-10-23 20:14:23,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-23 20:14:23,671 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 5 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:23,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 649 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-23 20:14:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2024-10-23 20:14:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 97 states have internal predecessors, (128), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-23 20:14:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 152 transitions. [2024-10-23 20:14:23,677 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 152 transitions. Word has length 50 [2024-10-23 20:14:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:23,678 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 152 transitions. [2024-10-23 20:14:23,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 20:14:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 152 transitions. [2024-10-23 20:14:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-23 20:14:23,678 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:23,678 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:23,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-23 20:14:23,679 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:23,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:23,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1301536346, now seen corresponding path program 1 times [2024-10-23 20:14:23,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:23,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481387734] [2024-10-23 20:14:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:23,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 20:14:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 20:14:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:23,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:23,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481387734] [2024-10-23 20:14:23,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481387734] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:23,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442956444] [2024-10-23 20:14:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:23,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:23,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:23,792 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:23,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-23 20:14:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:23,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-23 20:14:23,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-23 20:14:23,877 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 20:14:23,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442956444] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:23,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 20:14:23,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2024-10-23 20:14:23,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214804630] [2024-10-23 20:14:23,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:23,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-23 20:14:23,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:23,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-23 20:14:23,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-10-23 20:14:23,878 INFO L87 Difference]: Start difference. First operand 107 states and 152 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:23,912 INFO L93 Difference]: Finished difference Result 117 states and 162 transitions. [2024-10-23 20:14:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 20:14:23,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2024-10-23 20:14:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:23,913 INFO L225 Difference]: With dead ends: 117 [2024-10-23 20:14:23,913 INFO L226 Difference]: Without dead ends: 111 [2024-10-23 20:14:23,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-10-23 20:14:23,914 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 2 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 324 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 [2024-10-23 20:14:23,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 324 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-23 20:14:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-10-23 20:14:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.3333333333333333) internal successors, (132), 101 states have internal predecessors, (132), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-10-23 20:14:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2024-10-23 20:14:23,922 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 50 [2024-10-23 20:14:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:23,923 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2024-10-23 20:14:23,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2024-10-23 20:14:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-23 20:14:23,925 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:23,925 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:23,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-23 20:14:24,126 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,SelfDestructingSolverStorable12 [2024-10-23 20:14:24,126 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:24,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1358794648, now seen corresponding path program 1 times [2024-10-23 20:14:24,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:24,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932024798] [2024-10-23 20:14:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 20:14:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 20:14:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-23 20:14:24,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:24,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932024798] [2024-10-23 20:14:24,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932024798] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:24,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 20:14:24,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-23 20:14:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428030520] [2024-10-23 20:14:24,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:24,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-23 20:14:24,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-23 20:14:24,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-23 20:14:24,201 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:24,236 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2024-10-23 20:14:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 20:14:24,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2024-10-23 20:14:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:24,238 INFO L225 Difference]: With dead ends: 117 [2024-10-23 20:14:24,238 INFO L226 Difference]: Without dead ends: 100 [2024-10-23 20:14:24,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-23 20:14:24,238 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 1 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 426 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 [2024-10-23 20:14:24,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 426 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-23 20:14:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-10-23 20:14:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 91 states have internal predecessors, (118), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-23 20:14:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 139 transitions. [2024-10-23 20:14:24,245 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 139 transitions. Word has length 50 [2024-10-23 20:14:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:24,245 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 139 transitions. [2024-10-23 20:14:24,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 139 transitions. [2024-10-23 20:14:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-23 20:14:24,246 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:24,246 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:24,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-23 20:14:24,246 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:24,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1928731325, now seen corresponding path program 1 times [2024-10-23 20:14:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:24,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254673885] [2024-10-23 20:14:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:24,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 20:14:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 20:14:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-23 20:14:24,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254673885] [2024-10-23 20:14:24,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254673885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193432324] [2024-10-23 20:14:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:24,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:24,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:24,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:24,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-23 20:14:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-23 20:14:24,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-23 20:14:24,624 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 20:14:24,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193432324] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:24,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 20:14:24,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2024-10-23 20:14:24,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124740687] [2024-10-23 20:14:24,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:24,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-23 20:14:24,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-23 20:14:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-10-23 20:14:24,625 INFO L87 Difference]: Start difference. First operand 100 states and 139 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:24,683 INFO L93 Difference]: Finished difference Result 145 states and 196 transitions. [2024-10-23 20:14:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 20:14:24,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2024-10-23 20:14:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:24,685 INFO L225 Difference]: With dead ends: 145 [2024-10-23 20:14:24,685 INFO L226 Difference]: Without dead ends: 102 [2024-10-23 20:14:24,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-10-23 20:14:24,685 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 31 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:24,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 592 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-23 20:14:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-10-23 20:14:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 93 states have internal predecessors, (119), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-23 20:14:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 141 transitions. [2024-10-23 20:14:24,692 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 141 transitions. Word has length 59 [2024-10-23 20:14:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:24,692 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 141 transitions. [2024-10-23 20:14:24,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 141 transitions. [2024-10-23 20:14:24,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-23 20:14:24,693 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:24,693 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:24,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-23 20:14:24,896 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 [2024-10-23 20:14:24,896 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:24,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash 46586627, now seen corresponding path program 2 times [2024-10-23 20:14:24,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363137671] [2024-10-23 20:14:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:24,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 20:14:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:24,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-23 20:14:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-23 20:14:25,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363137671] [2024-10-23 20:14:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363137671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 20:14:25,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 20:14:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-23 20:14:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551335934] [2024-10-23 20:14:25,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 20:14:25,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 20:14:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 20:14:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-23 20:14:25,010 INFO L87 Difference]: Start difference. First operand 102 states and 141 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:25,049 INFO L93 Difference]: Finished difference Result 142 states and 191 transitions. [2024-10-23 20:14:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-23 20:14:25,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2024-10-23 20:14:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:25,050 INFO L225 Difference]: With dead ends: 142 [2024-10-23 20:14:25,050 INFO L226 Difference]: Without dead ends: 102 [2024-10-23 20:14:25,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-23 20:14:25,051 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 1 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:25,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 478 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 20:14:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-23 20:14:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-10-23 20:14:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 90 states have internal predecessors, (117), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-10-23 20:14:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2024-10-23 20:14:25,058 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 59 [2024-10-23 20:14:25,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:25,058 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2024-10-23 20:14:25,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-23 20:14:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2024-10-23 20:14:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-23 20:14:25,059 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:25,059 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:25,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-23 20:14:25,059 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:25,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1161197603, now seen corresponding path program 1 times [2024-10-23 20:14:25,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:25,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411217518] [2024-10-23 20:14:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:25,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 20:14:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 20:14:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-23 20:14:25,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:25,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411217518] [2024-10-23 20:14:25,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411217518] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:25,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878957358] [2024-10-23 20:14:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:25,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:25,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:25,189 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:25,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-23 20:14:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-23 20:14:25,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-23 20:14:25,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:14:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-23 20:14:25,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878957358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:14:25,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:14:25,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-10-23 20:14:25,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973453017] [2024-10-23 20:14:25,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:14:25,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-23 20:14:25,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-23 20:14:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-10-23 20:14:25,366 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 14 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-23 20:14:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:25,437 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2024-10-23 20:14:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-23 20:14:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2024-10-23 20:14:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:25,438 INFO L225 Difference]: With dead ends: 142 [2024-10-23 20:14:25,438 INFO L226 Difference]: Without dead ends: 98 [2024-10-23 20:14:25,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-23 20:14:25,439 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 1 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:25,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 809 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:14:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-23 20:14:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-10-23 20:14:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 90 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-23 20:14:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2024-10-23 20:14:25,446 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 64 [2024-10-23 20:14:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:25,446 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2024-10-23 20:14:25,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-23 20:14:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2024-10-23 20:14:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-23 20:14:25,447 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:25,447 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:25,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-23 20:14:25,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-23 20:14:25,650 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:25,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:25,651 INFO L85 PathProgramCache]: Analyzing trace with hash -161132588, now seen corresponding path program 1 times [2024-10-23 20:14:25,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:25,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327000861] [2024-10-23 20:14:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:25,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 20:14:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,732 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-10-23 20:14:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:25,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:25,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327000861] [2024-10-23 20:14:25,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327000861] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:25,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654792107] [2024-10-23 20:14:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:25,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:25,738 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:25,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-23 20:14:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:25,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-23 20:14:25,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-23 20:14:25,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:14:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-23 20:14:25,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654792107] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:14:25,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:14:25,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 8] total 16 [2024-10-23 20:14:25,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251259061] [2024-10-23 20:14:25,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:14:25,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-23 20:14:25,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:25,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-23 20:14:25,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-10-23 20:14:25,957 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 16 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-23 20:14:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:26,183 INFO L93 Difference]: Finished difference Result 214 states and 276 transitions. [2024-10-23 20:14:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-23 20:14:26,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 68 [2024-10-23 20:14:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:26,184 INFO L225 Difference]: With dead ends: 214 [2024-10-23 20:14:26,184 INFO L226 Difference]: Without dead ends: 122 [2024-10-23 20:14:26,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-10-23 20:14:26,185 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 29 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:26,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 684 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:14:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-23 20:14:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2024-10-23 20:14:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 96 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-23 20:14:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 136 transitions. [2024-10-23 20:14:26,191 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 136 transitions. Word has length 68 [2024-10-23 20:14:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:26,191 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 136 transitions. [2024-10-23 20:14:26,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-23 20:14:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 136 transitions. [2024-10-23 20:14:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-23 20:14:26,192 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:26,192 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:26,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-23 20:14:26,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-23 20:14:26,395 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:26,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:26,396 INFO L85 PathProgramCache]: Analyzing trace with hash 463870490, now seen corresponding path program 1 times [2024-10-23 20:14:26,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:26,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753506563] [2024-10-23 20:14:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:26,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:26,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:26,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:26,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-23 20:14:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:26,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-23 20:14:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:26,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:26,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753506563] [2024-10-23 20:14:26,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753506563] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:26,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202433006] [2024-10-23 20:14:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:26,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:26,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:26,661 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:26,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-23 20:14:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:26,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-23 20:14:26,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-23 20:14:26,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:14:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-23 20:14:26,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202433006] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:14:26,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:14:26,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2024-10-23 20:14:26,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642133999] [2024-10-23 20:14:26,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:14:26,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-23 20:14:26,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:26,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-23 20:14:26,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-10-23 20:14:26,967 INFO L87 Difference]: Start difference. First operand 106 states and 136 transitions. Second operand has 18 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-23 20:14:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:27,259 INFO L93 Difference]: Finished difference Result 226 states and 290 transitions. [2024-10-23 20:14:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-23 20:14:27,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2024-10-23 20:14:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:27,260 INFO L225 Difference]: With dead ends: 226 [2024-10-23 20:14:27,260 INFO L226 Difference]: Without dead ends: 126 [2024-10-23 20:14:27,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-10-23 20:14:27,261 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 54 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:27,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 814 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 20:14:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-23 20:14:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2024-10-23 20:14:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 98 states have internal predecessors, (122), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-23 20:14:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2024-10-23 20:14:27,266 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 71 [2024-10-23 20:14:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:27,266 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2024-10-23 20:14:27,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-23 20:14:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2024-10-23 20:14:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-23 20:14:27,267 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:27,267 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:27,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-23 20:14:27,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:27,468 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:27,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1419740968, now seen corresponding path program 1 times [2024-10-23 20:14:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:27,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662247736] [2024-10-23 20:14:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:27,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:27,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:27,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-23 20:14:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:27,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-23 20:14:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:27,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662247736] [2024-10-23 20:14:27,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662247736] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938734023] [2024-10-23 20:14:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:27,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:27,571 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:27,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-23 20:14:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:27,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-23 20:14:27,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-23 20:14:27,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:14:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:27,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938734023] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:14:27,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:14:27,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-23 20:14:27,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875939038] [2024-10-23 20:14:27,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:14:27,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 20:14:27,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 20:14:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2024-10-23 20:14:27,833 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-23 20:14:27,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:27,957 INFO L93 Difference]: Finished difference Result 307 states and 399 transitions. [2024-10-23 20:14:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-23 20:14:27,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2024-10-23 20:14:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:27,959 INFO L225 Difference]: With dead ends: 307 [2024-10-23 20:14:27,959 INFO L226 Difference]: Without dead ends: 201 [2024-10-23 20:14:27,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-10-23 20:14:27,960 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 228 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:27,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 585 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 20:14:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-23 20:14:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 126. [2024-10-23 20:14:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.280701754385965) internal successors, (146), 116 states have internal predecessors, (146), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-23 20:14:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2024-10-23 20:14:27,966 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 75 [2024-10-23 20:14:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:27,966 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2024-10-23 20:14:27,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-23 20:14:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2024-10-23 20:14:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-23 20:14:27,967 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 20:14:27,968 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:27,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-23 20:14:28,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:28,168 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 20:14:28,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 20:14:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1815766257, now seen corresponding path program 1 times [2024-10-23 20:14:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 20:14:28,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345068595] [2024-10-23 20:14:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 20:14:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:28,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 20:14:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:28,250 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 20:14:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:28,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 20:14:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:28,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-23 20:14:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 20:14:28,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 20:14:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345068595] [2024-10-23 20:14:28,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345068595] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 20:14:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107127904] [2024-10-23 20:14:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 20:14:28,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:28,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 20:14:28,352 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 20:14:28,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-23 20:14:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 20:14:28,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-23 20:14:28,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 20:14:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-23 20:14:28,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 20:14:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-23 20:14:28,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107127904] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 20:14:28,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 20:14:28,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 19 [2024-10-23 20:14:28,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189763470] [2024-10-23 20:14:28,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 20:14:28,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-23 20:14:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 20:14:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-23 20:14:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-10-23 20:14:28,797 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 19 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-23 20:14:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 20:14:29,119 INFO L93 Difference]: Finished difference Result 229 states and 295 transitions. [2024-10-23 20:14:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-23 20:14:29,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2024-10-23 20:14:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 20:14:29,120 INFO L225 Difference]: With dead ends: 229 [2024-10-23 20:14:29,120 INFO L226 Difference]: Without dead ends: 0 [2024-10-23 20:14:29,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-10-23 20:14:29,121 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 20:14:29,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 282 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 20:14:29,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-23 20:14:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-23 20:14:29,122 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) [2024-10-23 20:14:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-23 20:14:29,122 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 76 [2024-10-23 20:14:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 20:14:29,122 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-23 20:14:29,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-23 20:14:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-23 20:14:29,122 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-23 20:14:29,127 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-23 20:14:29,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-23 20:14:29,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 20:14:29,335 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 20:14:29,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-23 20:14:29,923 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-23 20:14:29,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:14:29 BoogieIcfgContainer [2024-10-23 20:14:29,964 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-23 20:14:29,964 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-23 20:14:29,964 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-23 20:14:29,965 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-23 20:14:29,965 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:14:17" (3/4) ... [2024-10-23 20:14:29,966 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-23 20:14:29,969 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2024-10-23 20:14:29,969 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-23 20:14:29,975 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2024-10-23 20:14:29,976 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2024-10-23 20:14:29,976 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-23 20:14:29,977 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-23 20:14:30,000 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((e == \old(e)) && (m <= 33554431)) && ((m == 1) || (m == \old(m)))) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) [2024-10-23 20:14:30,001 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((0 < \old(m)) && ((((\old(e) <= e) && (0 <= 0)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m)))) [2024-10-23 20:14:30,017 WARN L140 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((0 < \old(m)) && ((((\old(e) <= e) && (0 <= 0)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m)))) [2024-10-23 20:14:30,017 WARN L140 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((e == \old(e)) && (m <= 33554431)) && ((m == 1) || (m == \old(m)))) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) [2024-10-23 20:14:30,049 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-23 20:14:30,050 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-23 20:14:30,050 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-23 20:14:30,050 INFO L158 Benchmark]: Toolchain (without parser) took 13155.21ms. Allocated memory was 159.4MB in the beginning and 306.2MB in the end (delta: 146.8MB). Free memory was 87.4MB in the beginning and 144.4MB in the end (delta: -56.9MB). Peak memory consumption was 90.6MB. Max. memory is 16.1GB. [2024-10-23 20:14:30,050 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 159.4MB. Free memory is still 110.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-23 20:14:30,051 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.20ms. Allocated memory is still 159.4MB. Free memory was 87.2MB in the beginning and 72.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-23 20:14:30,051 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.64ms. Allocated memory is still 159.4MB. Free memory was 72.1MB in the beginning and 70.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-23 20:14:30,051 INFO L158 Benchmark]: Boogie Preprocessor took 47.92ms. Allocated memory is still 159.4MB. Free memory was 70.0MB in the beginning and 67.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-23 20:14:30,051 INFO L158 Benchmark]: RCFGBuilder took 484.16ms. Allocated memory was 159.4MB in the beginning and 205.5MB in the end (delta: 46.1MB). Free memory was 67.6MB in the beginning and 165.6MB in the end (delta: -97.9MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2024-10-23 20:14:30,051 INFO L158 Benchmark]: TraceAbstraction took 12230.21ms. Allocated memory was 205.5MB in the beginning and 306.2MB in the end (delta: 100.7MB). Free memory was 164.5MB in the beginning and 150.7MB in the end (delta: 13.9MB). Peak memory consumption was 170.3MB. Max. memory is 16.1GB. [2024-10-23 20:14:30,052 INFO L158 Benchmark]: Witness Printer took 85.42ms. Allocated memory is still 306.2MB. Free memory was 150.7MB in the beginning and 144.4MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-23 20:14:30,052 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 159.4MB. Free memory is still 110.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.20ms. Allocated memory is still 159.4MB. Free memory was 87.2MB in the beginning and 72.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.64ms. Allocated memory is still 159.4MB. Free memory was 72.1MB in the beginning and 70.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.92ms. Allocated memory is still 159.4MB. Free memory was 70.0MB in the beginning and 67.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 484.16ms. Allocated memory was 159.4MB in the beginning and 205.5MB in the end (delta: 46.1MB). Free memory was 67.6MB in the beginning and 165.6MB in the end (delta: -97.9MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * TraceAbstraction took 12230.21ms. Allocated memory was 205.5MB in the beginning and 306.2MB in the end (delta: 100.7MB). Free memory was 164.5MB in the beginning and 150.7MB in the end (delta: 13.9MB). Peak memory consumption was 170.3MB. Max. memory is 16.1GB. * Witness Printer took 85.42ms. Allocated memory is still 306.2MB. Free memory was 150.7MB in the beginning and 144.4MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. 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 3 procedures, 70 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.5s, OverallIterations: 21, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 885 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 884 mSDsluCounter, 8445 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6818 mSDsCounter, 104 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2491 IncrementalHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 104 mSolverCounterUnsat, 1627 mSDtfsCounter, 2491 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1652 GetRequests, 1453 SyntacticMatches, 3 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=20, InterpolantAutomatonStates: 175, 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, 21 MinimizatonAttempts, 262 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 1955 NumberOfCodeBlocks, 1955 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 2400 ConstructedInterpolants, 0 QuantifiedInterpolants, 4366 SizeOfPredicates, 8 NumberOfNonLiveVariables, 2789 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 45 InterpolantComputations, 13 PerfectInterpolantSequences, 1078/1347 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: 37]: Loop Invariant Derived loop invariant: (((((e == \old(e)) && (m <= 33554431)) && ((m == 1) || (m == \old(m)))) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: ((0 < \old(m)) && ((((\old(e) <= e) && (0 <= 0)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m)))) - ProcedureContractResult [Line: 24]: Procedure Contract for base2flt Derived contract for procedure base2flt. Ensures: ((\result == 0) || (0 < m)) - ProcedureContractResult [Line: 15]: 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! [2024-10-23 20:14:30,081 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