./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.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/nla-digbench-scaling/ps4-ll_unwindbound50.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 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:29:06,147 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:29:06,228 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:29:06,234 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:29:06,234 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:29:06,258 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:29:06,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:29:06,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:29:06,260 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:29:06,262 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:29:06,262 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:29:06,263 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:29:06,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:29:06,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:29:06,265 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:29:06,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:29:06,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:29:06,266 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:29:06,266 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:29:06,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:29:06,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:29:06,270 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:29:06,270 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:29:06,271 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:29:06,271 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:29:06,271 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:29:06,271 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:29:06,271 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:29:06,272 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:29:06,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:29:06,272 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:29:06,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:29:06,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:29:06,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:29:06,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:29:06,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:29:06,273 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:29:06,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:29:06,274 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:29:06,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:29:06,275 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:29:06,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:29:06,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2024-10-24 00:29:06,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:29:06,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:29:06,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:29:06,546 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:29:06,547 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:29:06,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2024-10-24 00:29:08,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:29:08,205 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:29:08,208 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2024-10-24 00:29:08,217 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb21fe374/1a745d6671f24b90b2cde3529e9ff036/FLAGd6eea2382 [2024-10-24 00:29:08,576 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb21fe374/1a745d6671f24b90b2cde3529e9ff036 [2024-10-24 00:29:08,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:29:08,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:29:08,581 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:29:08,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:29:08,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:29:08,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc13026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08, skipping insertion in model container [2024-10-24 00:29:08,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,610 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:29:08,827 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2024-10-24 00:29:08,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:29:08,858 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:29:08,869 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2024-10-24 00:29:08,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:29:08,894 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:29:08,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08 WrapperNode [2024-10-24 00:29:08,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:29:08,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:29:08,897 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:29:08,897 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:29:08,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,925 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2024-10-24 00:29:08,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:29:08,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:29:08,927 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:29:08,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:29:08,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,957 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]. [2024-10-24 00:29:08,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,959 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,964 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,966 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,968 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:29:08,970 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:29:08,970 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:29:08,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:29:08,971 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2024-10-24 00:29:08,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:29:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:09,002 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) [2024-10-24 00:29:09,006 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 [2024-10-24 00:29:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:29:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:29:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:29:09,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:29:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:29:09,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:29:09,095 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:29:09,097 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:29:09,193 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-24 00:29:09,194 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:29:09,214 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:29:09,214 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-24 00:29:09,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:29:09 BoogieIcfgContainer [2024-10-24 00:29:09,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:29:09,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:29:09,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:29:09,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:29:09,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:29:08" (1/3) ... [2024-10-24 00:29:09,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2948840f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:29:09, skipping insertion in model container [2024-10-24 00:29:09,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (2/3) ... [2024-10-24 00:29:09,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2948840f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:29:09, skipping insertion in model container [2024-10-24 00:29:09,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:29:09" (3/3) ... [2024-10-24 00:29:09,225 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2024-10-24 00:29:09,237 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:29:09,238 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:29:09,286 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:29:09,292 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;@1eaa8c87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:29:09,292 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:29:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 00:29:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-24 00:29:09,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:09,302 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 00:29:09,303 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:09,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2070802916, now seen corresponding path program 1 times [2024-10-24 00:29:09,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:09,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139587623] [2024-10-24 00:29:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:09,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:09,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:09,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139587623] [2024-10-24 00:29:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139587623] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:29:09,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:29:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:29:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527109267] [2024-10-24 00:29:09,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:29:09,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:29:09,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:29:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:29:09,501 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:29:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:09,528 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2024-10-24 00:29:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:29:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-24 00:29:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:09,537 INFO L225 Difference]: With dead ends: 29 [2024-10-24 00:29:09,537 INFO L226 Difference]: Without dead ends: 13 [2024-10-24 00:29:09,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:29:09,546 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:09,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:29:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-24 00:29:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-24 00:29:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 00:29:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-10-24 00:29:09,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2024-10-24 00:29:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:09,582 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-10-24 00:29:09,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:29:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-10-24 00:29:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 00:29:09,584 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:09,584 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:29:09,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:29:09,585 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:09,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:09,586 INFO L85 PathProgramCache]: Analyzing trace with hash -170804699, now seen corresponding path program 1 times [2024-10-24 00:29:09,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:09,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974005638] [2024-10-24 00:29:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:09,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:09,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:09,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974005638] [2024-10-24 00:29:09,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974005638] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:29:09,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:29:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 00:29:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174806150] [2024-10-24 00:29:09,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:29:09,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 00:29:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:09,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 00:29:09,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:29:09,728 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:29:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:09,756 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-10-24 00:29:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 00:29:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 00:29:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:09,758 INFO L225 Difference]: With dead ends: 23 [2024-10-24 00:29:09,758 INFO L226 Difference]: Without dead ends: 15 [2024-10-24 00:29:09,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 00:29:09,759 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:09,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:29:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-24 00:29:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-24 00:29:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 00:29:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-24 00:29:09,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2024-10-24 00:29:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:09,770 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-24 00:29:09,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:29:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-24 00:29:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 00:29:09,771 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:09,771 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:29:09,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 00:29:09,772 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:09,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash -169017239, now seen corresponding path program 1 times [2024-10-24 00:29:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:09,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764195753] [2024-10-24 00:29:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:09,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:29:09,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199146162] [2024-10-24 00:29:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:09,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:09,799 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) [2024-10-24 00:29:09,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:29:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:09,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:29:09,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:09,985 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:29:09,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764195753] [2024-10-24 00:29:09,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:29:09,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199146162] [2024-10-24 00:29:09,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199146162] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:29:09,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:29:09,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 00:29:09,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521116812] [2024-10-24 00:29:09,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:29:09,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:29:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:29:09,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:29:09,994 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:29:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:10,056 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-24 00:29:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:29:10,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 00:29:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:10,058 INFO L225 Difference]: With dead ends: 25 [2024-10-24 00:29:10,058 INFO L226 Difference]: Without dead ends: 21 [2024-10-24 00:29:10,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:29:10,059 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:10,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:29:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-24 00:29:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-24 00:29:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 00:29:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-10-24 00:29:10,072 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2024-10-24 00:29:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:10,072 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-10-24 00:29:10,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 00:29:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-10-24 00:29:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-24 00:29:10,074 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:10,074 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:29:10,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 00:29:10,278 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 [2024-10-24 00:29:10,279 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:10,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash 867499275, now seen corresponding path program 1 times [2024-10-24 00:29:10,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:10,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059516460] [2024-10-24 00:29:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:10,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:10,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:29:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:10,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:10,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059516460] [2024-10-24 00:29:10,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059516460] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:29:10,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140911779] [2024-10-24 00:29:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:10,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:10,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:10,434 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) [2024-10-24 00:29:10,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:29:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:10,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 00:29:10,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:10,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:29:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:10,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140911779] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:29:10,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:29:10,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-24 00:29:10,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362507921] [2024-10-24 00:29:10,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:29:10,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 00:29:10,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 00:29:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:29:10,564 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 00:29:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:10,636 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2024-10-24 00:29:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 00:29:10,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-10-24 00:29:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:10,638 INFO L225 Difference]: With dead ends: 55 [2024-10-24 00:29:10,638 INFO L226 Difference]: Without dead ends: 47 [2024-10-24 00:29:10,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:29:10,640 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:10,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 61 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:29:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-24 00:29:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-10-24 00:29:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-24 00:29:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-10-24 00:29:10,653 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2024-10-24 00:29:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:10,653 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-10-24 00:29:10,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 00:29:10,654 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-10-24 00:29:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-24 00:29:10,654 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:10,654 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:29:10,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 00:29:10,857 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 [2024-10-24 00:29:10,858 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:10,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash 869286735, now seen corresponding path program 1 times [2024-10-24 00:29:10,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:10,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198380770] [2024-10-24 00:29:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:10,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:29:10,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201196148] [2024-10-24 00:29:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:10,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:10,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:10,910 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) [2024-10-24 00:29:10,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:29:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:10,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 00:29:10,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:11,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:29:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:11,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198380770] [2024-10-24 00:29:11,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:29:11,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201196148] [2024-10-24 00:29:11,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201196148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:29:11,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:29:11,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2024-10-24 00:29:11,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908904751] [2024-10-24 00:29:11,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:29:11,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 00:29:11,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 00:29:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-10-24 00:29:11,193 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 00:29:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:11,273 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2024-10-24 00:29:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 00:29:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-10-24 00:29:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:11,274 INFO L225 Difference]: With dead ends: 57 [2024-10-24 00:29:11,274 INFO L226 Difference]: Without dead ends: 46 [2024-10-24 00:29:11,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:29:11,276 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:11,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:29:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-24 00:29:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2024-10-24 00:29:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 00:29:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2024-10-24 00:29:11,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2024-10-24 00:29:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:11,285 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2024-10-24 00:29:11,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 00:29:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2024-10-24 00:29:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 00:29:11,286 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:11,286 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 00:29:11,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 00:29:11,490 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 [2024-10-24 00:29:11,491 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:11,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash 24753612, now seen corresponding path program 1 times [2024-10-24 00:29:11,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:11,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049132039] [2024-10-24 00:29:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:11,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:29:11,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363099052] [2024-10-24 00:29:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:11,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:11,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:11,515 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) [2024-10-24 00:29:11,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:29:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:11,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 00:29:11,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 00:29:11,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:29:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 00:29:11,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:11,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049132039] [2024-10-24 00:29:11,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:29:11,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363099052] [2024-10-24 00:29:11,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363099052] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:29:11,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:29:11,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-10-24 00:29:11,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549012496] [2024-10-24 00:29:11,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:29:11,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 00:29:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 00:29:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:29:11,913 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 00:29:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:12,056 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-10-24 00:29:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 00:29:12,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-10-24 00:29:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:12,057 INFO L225 Difference]: With dead ends: 48 [2024-10-24 00:29:12,057 INFO L226 Difference]: Without dead ends: 42 [2024-10-24 00:29:12,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-10-24 00:29:12,058 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:12,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 82 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:29:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-24 00:29:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-24 00:29:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-24 00:29:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-10-24 00:29:12,089 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2024-10-24 00:29:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:12,090 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-10-24 00:29:12,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 00:29:12,090 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-10-24 00:29:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-24 00:29:12,091 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:12,091 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-10-24 00:29:12,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-24 00:29:12,294 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 [2024-10-24 00:29:12,295 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:12,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash -795795011, now seen corresponding path program 2 times [2024-10-24 00:29:12,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:12,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334398930] [2024-10-24 00:29:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:12,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:12,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:29:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:12,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-24 00:29:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:12,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 00:29:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:12,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:29:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:29:12,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:12,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334398930] [2024-10-24 00:29:12,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334398930] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:29:12,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490799603] [2024-10-24 00:29:12,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:29:12,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:12,524 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) [2024-10-24 00:29:12,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:29:12,583 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:29:12,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:29:12,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:29:12,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:12,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:29:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-24 00:29:12,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490799603] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:29:12,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:29:12,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-24 00:29:12,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895171604] [2024-10-24 00:29:12,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:29:12,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 00:29:12,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:12,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 00:29:12,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-10-24 00:29:12,767 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-24 00:29:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:12,971 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2024-10-24 00:29:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 00:29:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 39 [2024-10-24 00:29:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:12,973 INFO L225 Difference]: With dead ends: 118 [2024-10-24 00:29:12,973 INFO L226 Difference]: Without dead ends: 113 [2024-10-24 00:29:12,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-10-24 00:29:12,974 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:12,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 94 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:29:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-24 00:29:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2024-10-24 00:29:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 00:29:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2024-10-24 00:29:12,991 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 39 [2024-10-24 00:29:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:12,991 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2024-10-24 00:29:12,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-24 00:29:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2024-10-24 00:29:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-24 00:29:12,992 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:12,992 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2024-10-24 00:29:13,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 00:29:13,193 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 [2024-10-24 00:29:13,193 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:13,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1312813826, now seen corresponding path program 2 times [2024-10-24 00:29:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:13,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649061794] [2024-10-24 00:29:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:29:13,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762956822] [2024-10-24 00:29:13,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:29:13,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:13,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:13,227 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) [2024-10-24 00:29:13,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 00:29:13,280 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:29:13,280 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:29:13,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-24 00:29:13,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 00:29:13,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:29:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 00:29:13,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:13,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649061794] [2024-10-24 00:29:13,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:29:13,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762956822] [2024-10-24 00:29:13,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762956822] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:29:13,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:29:13,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-10-24 00:29:13,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232254526] [2024-10-24 00:29:13,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:29:13,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 00:29:13,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 00:29:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-10-24 00:29:13,862 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 22 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 00:29:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:14,179 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2024-10-24 00:29:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 00:29:14,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45 [2024-10-24 00:29:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:14,181 INFO L225 Difference]: With dead ends: 94 [2024-10-24 00:29:14,181 INFO L226 Difference]: Without dead ends: 88 [2024-10-24 00:29:14,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2024-10-24 00:29:14,182 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:14,183 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 205 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:29:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-24 00:29:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-10-24 00:29:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 00:29:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2024-10-24 00:29:14,201 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 45 [2024-10-24 00:29:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:14,201 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2024-10-24 00:29:14,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 00:29:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2024-10-24 00:29:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-24 00:29:14,204 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:14,204 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-10-24 00:29:14,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 00:29:14,405 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 [2024-10-24 00:29:14,405 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:14,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:14,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1242040609, now seen corresponding path program 3 times [2024-10-24 00:29:14,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:14,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406583717] [2024-10-24 00:29:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:14,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:29:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-24 00:29:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 00:29:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:29:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-24 00:29:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-24 00:29:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-24 00:29:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:29:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-24 00:29:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-24 00:29:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-24 00:29:14,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:14,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406583717] [2024-10-24 00:29:14,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406583717] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:29:14,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551969006] [2024-10-24 00:29:14,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:29:14,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:14,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:14,838 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) [2024-10-24 00:29:14,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 00:29:14,933 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 00:29:14,933 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:29:14,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 00:29:14,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:15,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:29:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-24 00:29:15,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551969006] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:29:15,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:29:15,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 28 [2024-10-24 00:29:15,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756133026] [2024-10-24 00:29:15,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:29:15,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-24 00:29:15,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-24 00:29:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2024-10-24 00:29:15,391 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2024-10-24 00:29:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:15,894 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2024-10-24 00:29:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-24 00:29:15,895 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) Word has length 87 [2024-10-24 00:29:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:15,896 INFO L225 Difference]: With dead ends: 189 [2024-10-24 00:29:15,896 INFO L226 Difference]: Without dead ends: 184 [2024-10-24 00:29:15,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=1436, Unknown=0, NotChecked=0, Total=2256 [2024-10-24 00:29:15,901 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:15,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 138 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:29:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-24 00:29:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-10-24 00:29:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-24 00:29:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2024-10-24 00:29:15,954 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 87 [2024-10-24 00:29:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:15,954 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2024-10-24 00:29:15,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2024-10-24 00:29:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2024-10-24 00:29:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-10-24 00:29:15,964 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:15,964 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2024-10-24 00:29:15,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 00:29:16,168 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 [2024-10-24 00:29:16,169 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:16,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash 539512809, now seen corresponding path program 4 times [2024-10-24 00:29:16,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:16,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036295461] [2024-10-24 00:29:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:29:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-24 00:29:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 00:29:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:29:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-24 00:29:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-24 00:29:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-24 00:29:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:29:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,526 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-24 00:29:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-24 00:29:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-10-24 00:29:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-24 00:29:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-10-24 00:29:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-10-24 00:29:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-10-24 00:29:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-10-24 00:29:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-10-24 00:29:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-10-24 00:29:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-10-24 00:29:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2024-10-24 00:29:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2024-10-24 00:29:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-10-24 00:29:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-10-24 00:29:17,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:17,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036295461] [2024-10-24 00:29:17,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036295461] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:29:17,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700485271] [2024-10-24 00:29:17,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 00:29:17,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:17,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:17,569 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) [2024-10-24 00:29:17,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 00:29:18,269 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 00:29:18,270 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:29:18,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-24 00:29:18,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:18,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:29:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-10-24 00:29:19,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700485271] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:29:19,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:29:19,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 26] total 52 [2024-10-24 00:29:19,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378190578] [2024-10-24 00:29:19,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:29:19,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-24 00:29:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:19,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-24 00:29:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2024-10-24 00:29:19,405 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 52 states, 52 states have (on average 4.096153846153846) internal successors, (213), 52 states have internal predecessors, (213), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2024-10-24 00:29:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:20,739 INFO L93 Difference]: Finished difference Result 381 states and 404 transitions. [2024-10-24 00:29:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-10-24 00:29:20,740 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.096153846153846) internal successors, (213), 52 states have internal predecessors, (213), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) Word has length 183 [2024-10-24 00:29:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:20,743 INFO L225 Difference]: With dead ends: 381 [2024-10-24 00:29:20,743 INFO L226 Difference]: Without dead ends: 376 [2024-10-24 00:29:20,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3364, Invalid=5756, Unknown=0, NotChecked=0, Total=9120 [2024-10-24 00:29:20,746 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 221 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:20,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 230 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 00:29:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-10-24 00:29:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2024-10-24 00:29:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 282 states have (on average 1.00354609929078) internal successors, (283), 282 states have internal predecessors, (283), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-10-24 00:29:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 376 transitions. [2024-10-24 00:29:20,802 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 376 transitions. Word has length 183 [2024-10-24 00:29:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:20,803 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 376 transitions. [2024-10-24 00:29:20,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.096153846153846) internal successors, (213), 52 states have internal predecessors, (213), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2024-10-24 00:29:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 376 transitions. [2024-10-24 00:29:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2024-10-24 00:29:20,808 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:20,808 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1] [2024-10-24 00:29:20,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-24 00:29:21,009 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 [2024-10-24 00:29:21,010 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:21,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -890061447, now seen corresponding path program 5 times [2024-10-24 00:29:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:21,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231026464] [2024-10-24 00:29:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 00:29:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-24 00:29:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 00:29:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:29:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-24 00:29:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-24 00:29:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-24 00:29:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-24 00:29:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-24 00:29:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,708 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-24 00:29:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-10-24 00:29:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-24 00:29:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-10-24 00:29:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-10-24 00:29:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-10-24 00:29:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-10-24 00:29:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,728 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-10-24 00:29:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-10-24 00:29:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-10-24 00:29:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2024-10-24 00:29:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2024-10-24 00:29:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-10-24 00:29:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-10-24 00:29:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2024-10-24 00:29:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2024-10-24 00:29:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,761 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2024-10-24 00:29:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2024-10-24 00:29:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2024-10-24 00:29:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2024-10-24 00:29:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2024-10-24 00:29:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2024-10-24 00:29:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2024-10-24 00:29:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,786 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2024-10-24 00:29:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2024-10-24 00:29:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2024-10-24 00:29:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2024-10-24 00:29:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2024-10-24 00:29:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2024-10-24 00:29:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2024-10-24 00:29:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2024-10-24 00:29:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 323 [2024-10-24 00:29:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 331 [2024-10-24 00:29:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 339 [2024-10-24 00:29:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2024-10-24 00:29:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2024-10-24 00:29:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 363 [2024-10-24 00:29:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:29:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 4232 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2024-10-24 00:29:24,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:29:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231026464] [2024-10-24 00:29:24,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231026464] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:29:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003823353] [2024-10-24 00:29:24,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 00:29:24,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:24,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:24,840 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) [2024-10-24 00:29:24,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 00:29:26,547 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-10-24 00:29:26,548 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:29:26,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-10-24 00:29:26,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:29:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 00:29:26,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:29:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 4232 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2024-10-24 00:29:28,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003823353] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:29:28,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:29:28,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49, 50] total 56 [2024-10-24 00:29:28,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934115527] [2024-10-24 00:29:28,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:29:28,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-24 00:29:28,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:29:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-24 00:29:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2024-10-24 00:29:28,401 INFO L87 Difference]: Start difference. First operand 376 states and 376 transitions. Second operand has 56 states, 56 states have (on average 5.357142857142857) internal successors, (300), 56 states have internal predecessors, (300), 50 states have call successors, (96), 48 states have call predecessors, (96), 47 states have return successors, (95), 49 states have call predecessors, (95), 49 states have call successors, (95) [2024-10-24 00:29:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:29:29,829 INFO L93 Difference]: Finished difference Result 413 states and 416 transitions. [2024-10-24 00:29:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-10-24 00:29:29,829 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.357142857142857) internal successors, (300), 56 states have internal predecessors, (300), 50 states have call successors, (96), 48 states have call predecessors, (96), 47 states have return successors, (95), 49 states have call predecessors, (95), 49 states have call successors, (95) Word has length 375 [2024-10-24 00:29:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:29:29,833 INFO L225 Difference]: With dead ends: 413 [2024-10-24 00:29:29,833 INFO L226 Difference]: Without dead ends: 408 [2024-10-24 00:29:29,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 792 SyntacticMatches, 44 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3978, Invalid=6734, Unknown=0, NotChecked=0, Total=10712 [2024-10-24 00:29:29,837 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:29:29,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 233 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:29:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-10-24 00:29:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2024-10-24 00:29:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 306 states have (on average 1.0032679738562091) internal successors, (307), 306 states have internal predecessors, (307), 51 states have call successors, (51), 51 states have call predecessors, (51), 50 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-10-24 00:29:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 408 transitions. [2024-10-24 00:29:29,893 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 408 transitions. Word has length 375 [2024-10-24 00:29:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:29:29,894 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 408 transitions. [2024-10-24 00:29:29,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.357142857142857) internal successors, (300), 56 states have internal predecessors, (300), 50 states have call successors, (96), 48 states have call predecessors, (96), 47 states have return successors, (95), 49 states have call predecessors, (95), 49 states have call successors, (95) [2024-10-24 00:29:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 408 transitions. [2024-10-24 00:29:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2024-10-24 00:29:29,899 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:29:29,899 INFO L215 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1] [2024-10-24 00:29:29,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 00:29:30,100 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 [2024-10-24 00:29:30,100 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:29:30,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:29:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1280322287, now seen corresponding path program 6 times [2024-10-24 00:29:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:29:30,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026228059] [2024-10-24 00:29:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:29:30,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:29:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:29:30,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071189355] [2024-10-24 00:29:30,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 00:29:30,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:29:30,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:29:30,346 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) [2024-10-24 00:29:30,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process