./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/nla-digbench/hard-ll.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 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 01:11:48,382 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 01:11:48,431 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 01:11:48,437 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 01:11:48,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 01:11:48,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 01:11:48,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 01:11:48,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 01:11:48,461 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 01:11:48,464 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 01:11:48,464 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 01:11:48,464 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 01:11:48,465 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 01:11:48,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 01:11:48,465 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 01:11:48,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 01:11:48,465 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 01:11:48,465 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 01:11:48,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 01:11:48,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 01:11:48,466 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 01:11:48,468 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 01:11:48,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 01:11:48,469 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 01:11:48,469 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 01:11:48,469 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 01:11:48,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 01:11:48,469 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 01:11:48,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 01:11:48,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 01:11:48,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 01:11:48,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 01:11:48,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:11:48,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 01:11:48,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 01:11:48,472 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 01:11:48,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 01:11:48,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 01:11:48,472 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 01:11:48,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 01:11:48,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 01:11:48,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 01:11:48,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 [2024-11-22 01:11:48,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 01:11:48,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 01:11:48,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 01:11:48,658 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 01:11:48,658 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 01:11:48,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-ll.c [2024-11-22 01:11:49,944 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 01:11:50,118 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 01:11:50,118 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c [2024-11-22 01:11:50,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/701f43ca7/382f6726312845f995902202539b422b/FLAG1cfe96dc9 [2024-11-22 01:11:50,515 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/701f43ca7/382f6726312845f995902202539b422b [2024-11-22 01:11:50,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 01:11:50,518 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 01:11:50,520 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 01:11:50,520 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 01:11:50,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 01:11:50,535 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688e5118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50, skipping insertion in model container [2024-11-22 01:11:50,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,556 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 01:11:50,711 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c[538,551] [2024-11-22 01:11:50,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:11:50,729 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 01:11:50,738 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c[538,551] [2024-11-22 01:11:50,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:11:50,756 INFO L204 MainTranslator]: Completed translation [2024-11-22 01:11:50,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50 WrapperNode [2024-11-22 01:11:50,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 01:11:50,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 01:11:50,760 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 01:11:50,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 01:11:50,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,771 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,786 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2024-11-22 01:11:50,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 01:11:50,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 01:11:50,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 01:11:50,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 01:11:50,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,798 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,812 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]. [2024-11-22 01:11:50,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,819 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,822 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,826 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 01:11:50,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 01:11:50,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 01:11:50,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 01:11:50,828 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (1/1) ... [2024-11-22 01:11:50,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:11:50,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:11:50,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 01:11:50,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 01:11:50,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 01:11:50,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 01:11:50,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 01:11:50,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 01:11:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 01:11:50,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 01:11:50,949 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 01:11:50,953 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 01:11:51,131 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-22 01:11:51,131 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 01:11:51,145 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 01:11:51,146 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-22 01:11:51,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:11:51 BoogieIcfgContainer [2024-11-22 01:11:51,146 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 01:11:51,148 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 01:11:51,149 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 01:11:51,152 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 01:11:51,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:11:50" (1/3) ... [2024-11-22 01:11:51,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a663068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:11:51, skipping insertion in model container [2024-11-22 01:11:51,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:11:50" (2/3) ... [2024-11-22 01:11:51,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a663068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:11:51, skipping insertion in model container [2024-11-22 01:11:51,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:11:51" (3/3) ... [2024-11-22 01:11:51,156 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2024-11-22 01:11:51,168 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 01:11:51,169 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 01:11:51,220 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 01:11:51,227 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;@5c59ddc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 01:11:51,229 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 01:11:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-22 01:11:51,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-22 01:11:51,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:51,239 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:51,240 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:51,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2024-11-22 01:11:51,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:51,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571689586] [2024-11-22 01:11:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:51,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:11:51,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:51,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571689586] [2024-11-22 01:11:51,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571689586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:11:51,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:11:51,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 01:11:51,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481866915] [2024-11-22 01:11:51,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:11:51,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 01:11:51,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:51,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 01:11:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:11:51,400 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 01:11:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:51,418 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2024-11-22 01:11:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 01:11:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-22 01:11:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:51,425 INFO L225 Difference]: With dead ends: 49 [2024-11-22 01:11:51,426 INFO L226 Difference]: Without dead ends: 22 [2024-11-22 01:11:51,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:11:51,433 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:51,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:11:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-22 01:11:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-22 01:11:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 01:11:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-11-22 01:11:51,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2024-11-22 01:11:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:51,462 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-11-22 01:11:51,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 01:11:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-11-22 01:11:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-22 01:11:51,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:51,464 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:51,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 01:11:51,464 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:51,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2024-11-22 01:11:51,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:51,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164779619] [2024-11-22 01:11:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:51,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:11:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:51,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164779619] [2024-11-22 01:11:51,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164779619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:11:51,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:11:51,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:11:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735426796] [2024-11-22 01:11:51,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:11:51,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:11:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:11:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:11:51,616 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 01:11:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:51,678 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2024-11-22 01:11:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:11:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-22 01:11:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:51,679 INFO L225 Difference]: With dead ends: 35 [2024-11-22 01:11:51,679 INFO L226 Difference]: Without dead ends: 33 [2024-11-22 01:11:51,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:11:51,680 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:51,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:11:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-22 01:11:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2024-11-22 01:11:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 01:11:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-22 01:11:51,690 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2024-11-22 01:11:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:51,691 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-22 01:11:51,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 01:11:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-22 01:11:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-22 01:11:51,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:51,691 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:51,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 01:11:51,691 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:51,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2024-11-22 01:11:51,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:51,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92523392] [2024-11-22 01:11:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:11:51,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:51,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92523392] [2024-11-22 01:11:51,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92523392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:11:51,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:11:51,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:11:51,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099860061] [2024-11-22 01:11:51,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:11:51,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:11:51,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:11:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:11:51,792 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 01:11:51,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:51,848 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-11-22 01:11:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:11:51,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-22 01:11:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:51,850 INFO L225 Difference]: With dead ends: 39 [2024-11-22 01:11:51,850 INFO L226 Difference]: Without dead ends: 37 [2024-11-22 01:11:51,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:11:51,851 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:51,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:11:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-22 01:11:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2024-11-22 01:11:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 01:11:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-22 01:11:51,856 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2024-11-22 01:11:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:51,856 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-22 01:11:51,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 01:11:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-22 01:11:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-22 01:11:51,857 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:51,857 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:51,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 01:11:51,857 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:51,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2024-11-22 01:11:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076005925] [2024-11-22 01:11:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:11:51,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528738968] [2024-11-22 01:11:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:51,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:51,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:11:51,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:11:51,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 01:11:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:51,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:11:51,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:11:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:11:52,016 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:11:52,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:52,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076005925] [2024-11-22 01:11:52,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:11:52,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528738968] [2024-11-22 01:11:52,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528738968] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:11:52,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:11:52,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:11:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183825880] [2024-11-22 01:11:52,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:11:52,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:11:52,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:52,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:11:52,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:11:52,022 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 01:11:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:52,082 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2024-11-22 01:11:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:11:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-22 01:11:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:52,083 INFO L225 Difference]: With dead ends: 56 [2024-11-22 01:11:52,083 INFO L226 Difference]: Without dead ends: 43 [2024-11-22 01:11:52,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:11:52,085 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:52,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 89 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:11:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-22 01:11:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-22 01:11:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-22 01:11:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2024-11-22 01:11:52,104 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 19 [2024-11-22 01:11:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:52,105 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2024-11-22 01:11:52,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 01:11:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2024-11-22 01:11:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-22 01:11:52,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:52,106 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:52,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 01:11:52,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:52,312 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:52,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2024-11-22 01:11:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:52,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066728593] [2024-11-22 01:11:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:11:52,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437772996] [2024-11-22 01:11:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:52,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:52,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:11:52,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:11:52,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 01:11:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:52,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 01:11:52,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:11:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 01:11:52,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:11:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 01:11:52,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:52,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066728593] [2024-11-22 01:11:52,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:11:52,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437772996] [2024-11-22 01:11:52,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437772996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:11:52,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:11:52,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-22 01:11:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488956057] [2024-11-22 01:11:52,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:11:52,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 01:11:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 01:11:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-22 01:11:52,781 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 01:11:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:52,873 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2024-11-22 01:11:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 01:11:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-11-22 01:11:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:52,875 INFO L225 Difference]: With dead ends: 58 [2024-11-22 01:11:52,875 INFO L226 Difference]: Without dead ends: 56 [2024-11-22 01:11:52,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-22 01:11:52,876 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:52,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 90 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:11:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-22 01:11:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-11-22 01:11:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 01:11:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-11-22 01:11:52,897 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 26 [2024-11-22 01:11:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:52,898 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-11-22 01:11:52,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 01:11:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-11-22 01:11:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-22 01:11:52,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:52,899 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:52,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 01:11:53,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:53,101 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:53,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:53,102 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2024-11-22 01:11:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:53,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612964272] [2024-11-22 01:11:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:53,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:11:53,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379861505] [2024-11-22 01:11:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:53,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:53,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:11:53,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:11:53,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 01:11:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:53,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 01:11:53,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:11:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-22 01:11:53,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:11:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-22 01:11:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612964272] [2024-11-22 01:11:53,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:11:53,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379861505] [2024-11-22 01:11:53,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379861505] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 01:11:53,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:11:53,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-22 01:11:53,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724131856] [2024-11-22 01:11:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:11:53,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:11:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:11:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-22 01:11:53,314 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 01:11:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:53,367 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-11-22 01:11:53,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:11:53,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-22 01:11:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:53,369 INFO L225 Difference]: With dead ends: 63 [2024-11-22 01:11:53,369 INFO L226 Difference]: Without dead ends: 61 [2024-11-22 01:11:53,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-22 01:11:53,370 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:53,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:11:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-22 01:11:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-11-22 01:11:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 01:11:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2024-11-22 01:11:53,380 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 36 [2024-11-22 01:11:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:53,381 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2024-11-22 01:11:53,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 01:11:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2024-11-22 01:11:53,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-22 01:11:53,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:53,382 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:53,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 01:11:53,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:53,587 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:53,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:53,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1438911711, now seen corresponding path program 1 times [2024-11-22 01:11:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:53,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701976990] [2024-11-22 01:11:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:53,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-22 01:11:53,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701976990] [2024-11-22 01:11:53,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701976990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:11:53,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:11:53,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:11:53,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567064169] [2024-11-22 01:11:53,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:11:53,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:11:53,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:11:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:11:53,688 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-22 01:11:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:53,725 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2024-11-22 01:11:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:11:53,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-11-22 01:11:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:53,726 INFO L225 Difference]: With dead ends: 68 [2024-11-22 01:11:53,726 INFO L226 Difference]: Without dead ends: 56 [2024-11-22 01:11:53,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:11:53,727 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:53,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:11:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-22 01:11:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-22 01:11:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-22 01:11:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-22 01:11:53,736 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2024-11-22 01:11:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:53,736 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-22 01:11:53,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-22 01:11:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-22 01:11:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-22 01:11:53,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:53,738 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:53,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 01:11:53,738 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:53,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:53,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2024-11-22 01:11:53,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:53,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732993002] [2024-11-22 01:11:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:53,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:11:53,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208587012] [2024-11-22 01:11:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:53,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:53,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:11:53,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:11:53,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 01:11:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:53,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 01:11:53,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:11:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-22 01:11:54,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:11:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-22 01:11:55,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732993002] [2024-11-22 01:11:55,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:11:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208587012] [2024-11-22 01:11:55,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208587012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:11:55,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:11:55,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2024-11-22 01:11:55,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184035994] [2024-11-22 01:11:55,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:11:55,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 01:11:55,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:55,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 01:11:55,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-22 01:11:55,986 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-22 01:11:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:57,004 INFO L93 Difference]: Finished difference Result 143 states and 198 transitions. [2024-11-22 01:11:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 01:11:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 56 [2024-11-22 01:11:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:57,006 INFO L225 Difference]: With dead ends: 143 [2024-11-22 01:11:57,006 INFO L226 Difference]: Without dead ends: 120 [2024-11-22 01:11:57,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2024-11-22 01:11:57,007 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:57,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 189 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-22 01:11:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-22 01:11:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2024-11-22 01:11:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 62 states have internal predecessors, (69), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-22 01:11:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2024-11-22 01:11:57,073 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 56 [2024-11-22 01:11:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:57,074 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2024-11-22 01:11:57,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-22 01:11:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2024-11-22 01:11:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-22 01:11:57,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:57,075 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:57,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 01:11:57,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:57,276 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:57,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:57,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2024-11-22 01:11:57,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:57,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584447795] [2024-11-22 01:11:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:57,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:11:57,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671616992] [2024-11-22 01:11:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:57,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:57,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:11:57,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:11:57,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 01:11:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:57,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 01:11:57,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:11:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-22 01:11:57,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:11:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-22 01:11:58,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:58,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584447795] [2024-11-22 01:11:58,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:11:58,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671616992] [2024-11-22 01:11:58,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671616992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:11:58,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:11:58,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-11-22 01:11:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424334930] [2024-11-22 01:11:58,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:11:58,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 01:11:58,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:58,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 01:11:58,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-22 01:11:58,357 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-22 01:11:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:58,810 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2024-11-22 01:11:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 01:11:58,810 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 67 [2024-11-22 01:11:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:58,813 INFO L225 Difference]: With dead ends: 135 [2024-11-22 01:11:58,813 INFO L226 Difference]: Without dead ends: 101 [2024-11-22 01:11:58,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-11-22 01:11:58,814 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:58,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 304 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 01:11:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-22 01:11:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2024-11-22 01:11:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-22 01:11:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-11-22 01:11:58,856 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 67 [2024-11-22 01:11:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:58,857 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-11-22 01:11:58,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-22 01:11:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-11-22 01:11:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-22 01:11:58,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:58,863 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:58,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 01:11:59,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:59,064 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:59,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash -843815949, now seen corresponding path program 2 times [2024-11-22 01:11:59,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:59,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627814173] [2024-11-22 01:11:59,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:11:59,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:59,088 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:11:59,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:11:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-22 01:11:59,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:59,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627814173] [2024-11-22 01:11:59,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627814173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:11:59,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772660444] [2024-11-22 01:11:59,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:11:59,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:59,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:11:59,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:11:59,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 01:11:59,263 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:11:59,263 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:11:59,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:11:59,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:11:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-22 01:11:59,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:11:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-22 01:11:59,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772660444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:11:59,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:11:59,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-22 01:11:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898043584] [2024-11-22 01:11:59,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:11:59,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:11:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:11:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:11:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:11:59,353 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-22 01:11:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:11:59,395 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2024-11-22 01:11:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 01:11:59,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 69 [2024-11-22 01:11:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:11:59,397 INFO L225 Difference]: With dead ends: 114 [2024-11-22 01:11:59,397 INFO L226 Difference]: Without dead ends: 92 [2024-11-22 01:11:59,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:11:59,397 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:11:59,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:11:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-22 01:11:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-22 01:11:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-22 01:11:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2024-11-22 01:11:59,451 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 69 [2024-11-22 01:11:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:11:59,451 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2024-11-22 01:11:59,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-22 01:11:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2024-11-22 01:11:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-22 01:11:59,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:11:59,453 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:11:59,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 01:11:59,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:59,654 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:11:59,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:11:59,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1728532070, now seen corresponding path program 1 times [2024-11-22 01:11:59,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:11:59,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054005600] [2024-11-22 01:11:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:59,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:11:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-22 01:11:59,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:11:59,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054005600] [2024-11-22 01:11:59,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054005600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:11:59,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743887789] [2024-11-22 01:11:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:11:59,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:11:59,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:11:59,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:11:59,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 01:11:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:11:59,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 01:11:59,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-22 01:12:00,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:12:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-22 01:12:00,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743887789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:12:00,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:12:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2024-11-22 01:12:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975053733] [2024-11-22 01:12:00,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:12:00,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 01:12:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:12:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 01:12:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-22 01:12:00,556 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-22 01:12:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:12:00,765 INFO L93 Difference]: Finished difference Result 107 states and 133 transitions. [2024-11-22 01:12:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 01:12:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 72 [2024-11-22 01:12:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:12:00,768 INFO L225 Difference]: With dead ends: 107 [2024-11-22 01:12:00,768 INFO L226 Difference]: Without dead ends: 90 [2024-11-22 01:12:00,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-22 01:12:00,769 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:12:00,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 205 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:12:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-22 01:12:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2024-11-22 01:12:00,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 54 states have internal predecessors, (60), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-22 01:12:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2024-11-22 01:12:00,788 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 72 [2024-11-22 01:12:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:12:00,788 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2024-11-22 01:12:00,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-22 01:12:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2024-11-22 01:12:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-22 01:12:00,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:12:00,790 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:12:00,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 01:12:00,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:00,995 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:12:00,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:12:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1842513023, now seen corresponding path program 1 times [2024-11-22 01:12:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:12:00,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111584951] [2024-11-22 01:12:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:12:00,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:12:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:12:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-22 01:12:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:12:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111584951] [2024-11-22 01:12:01,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111584951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:12:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242923565] [2024-11-22 01:12:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:12:01,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:01,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:12:01,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:12:01,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 01:12:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:12:01,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 01:12:01,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-22 01:12:01,112 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:12:01,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242923565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:12:01,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:12:01,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-22 01:12:01,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938089045] [2024-11-22 01:12:01,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:12:01,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:12:01,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:12:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:12:01,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:12:01,113 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-22 01:12:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:12:01,153 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-11-22 01:12:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:12:01,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2024-11-22 01:12:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:12:01,154 INFO L225 Difference]: With dead ends: 90 [2024-11-22 01:12:01,154 INFO L226 Difference]: Without dead ends: 78 [2024-11-22 01:12:01,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:12:01,155 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:12:01,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:12:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-22 01:12:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-22 01:12:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 50 states have internal predecessors, (55), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-22 01:12:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2024-11-22 01:12:01,167 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 76 [2024-11-22 01:12:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:12:01,168 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2024-11-22 01:12:01,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-22 01:12:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2024-11-22 01:12:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-22 01:12:01,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:12:01,168 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:12:01,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 01:12:01,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 01:12:01,369 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:12:01,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:12:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 3 times [2024-11-22 01:12:01,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:12:01,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336397525] [2024-11-22 01:12:01,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:12:01,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:12:01,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-22 01:12:01,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:12:01,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939480244] [2024-11-22 01:12:01,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:12:01,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:01,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:12:01,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:12:01,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 01:12:01,452 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 01:12:01,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:12:01,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-22 01:12:01,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-22 01:12:01,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:12:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-22 01:12:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:12:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336397525] [2024-11-22 01:12:13,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:12:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939480244] [2024-11-22 01:12:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939480244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:12:13,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:12:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-22 01:12:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757481652] [2024-11-22 01:12:13,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:12:13,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 01:12:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:12:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 01:12:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-11-22 01:12:13,721 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-22 01:12:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:12:21,983 INFO L93 Difference]: Finished difference Result 152 states and 197 transitions. [2024-11-22 01:12:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 01:12:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 86 [2024-11-22 01:12:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:12:21,985 INFO L225 Difference]: With dead ends: 152 [2024-11-22 01:12:21,985 INFO L226 Difference]: Without dead ends: 130 [2024-11-22 01:12:21,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-11-22 01:12:21,989 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-22 01:12:21,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 332 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-22 01:12:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-22 01:12:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2024-11-22 01:12:22,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.125) internal successors, (81), 76 states have internal predecessors, (81), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-22 01:12:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 146 transitions. [2024-11-22 01:12:22,015 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 146 transitions. Word has length 86 [2024-11-22 01:12:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:12:22,016 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 146 transitions. [2024-11-22 01:12:22,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-22 01:12:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 146 transitions. [2024-11-22 01:12:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-22 01:12:22,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:12:22,017 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:12:22,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 01:12:22,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 01:12:22,221 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:12:22,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:12:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1231859808, now seen corresponding path program 1 times [2024-11-22 01:12:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:12:22,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866928173] [2024-11-22 01:12:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:12:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:12:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:12:22,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429769918] [2024-11-22 01:12:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:12:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:12:22,258 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:12:22,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 01:12:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:12:22,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-22 01:12:22,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-11-22 01:12:22,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:12:24,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:12:24,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866928173] [2024-11-22 01:12:24,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:12:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429769918] [2024-11-22 01:12:24,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429769918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:12:24,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:12:24,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-22 01:12:24,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627904764] [2024-11-22 01:12:24,583 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 01:12:24,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 01:12:24,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:12:24,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 01:12:24,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2024-11-22 01:12:24,584 INFO L87 Difference]: Start difference. First operand 118 states and 146 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-22 01:12:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:12:24,923 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2024-11-22 01:12:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 01:12:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2024-11-22 01:12:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:12:24,925 INFO L225 Difference]: With dead ends: 142 [2024-11-22 01:12:24,925 INFO L226 Difference]: Without dead ends: 140 [2024-11-22 01:12:24,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2024-11-22 01:12:24,925 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 01:12:24,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 306 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 01:12:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-22 01:12:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2024-11-22 01:12:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.103448275862069) internal successors, (96), 92 states have internal predecessors, (96), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (33), 29 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-22 01:12:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2024-11-22 01:12:24,953 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 97 [2024-11-22 01:12:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:12:24,953 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2024-11-22 01:12:24,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-22 01:12:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2024-11-22 01:12:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-22 01:12:24,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:12:24,955 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:12:24,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 01:12:25,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 01:12:25,156 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:12:25,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:12:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1474759586, now seen corresponding path program 2 times [2024-11-22 01:12:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:12:25,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698265589] [2024-11-22 01:12:25,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:12:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:12:25,184 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:12:25,186 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:12:25,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568443917] [2024-11-22 01:12:25,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:12:25,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:25,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:12:25,192 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:12:25,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 01:12:25,243 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:12:25,243 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:12:25,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-22 01:12:25,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 67 proven. 69 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-11-22 01:12:25,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:12:26,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:12:26,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698265589] [2024-11-22 01:12:26,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:12:26,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568443917] [2024-11-22 01:12:26,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568443917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:12:26,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:12:26,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-22 01:12:26,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592949098] [2024-11-22 01:12:26,342 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 01:12:26,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 01:12:26,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:12:26,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 01:12:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-22 01:12:26,343 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-22 01:12:30,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:12:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:12:30,757 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2024-11-22 01:12:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 01:12:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2024-11-22 01:12:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:12:30,758 INFO L225 Difference]: With dead ends: 152 [2024-11-22 01:12:30,758 INFO L226 Difference]: Without dead ends: 136 [2024-11-22 01:12:30,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-11-22 01:12:30,759 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-22 01:12:30,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 385 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 492 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-11-22 01:12:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-22 01:12:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2024-11-22 01:12:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 89 states have internal predecessors, (93), 34 states have call successors, (34), 16 states have call predecessors, (34), 16 states have return successors, (33), 29 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-22 01:12:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2024-11-22 01:12:30,786 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 97 [2024-11-22 01:12:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:12:30,786 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2024-11-22 01:12:30,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-22 01:12:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2024-11-22 01:12:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-22 01:12:30,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:12:30,787 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:12:30,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 01:12:30,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 01:12:30,991 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:12:30,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:12:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash 876035066, now seen corresponding path program 4 times [2024-11-22 01:12:30,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:12:30,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303474309] [2024-11-22 01:12:30,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 01:12:30,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:12:31,006 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 01:12:31,006 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:12:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-22 01:12:31,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:12:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303474309] [2024-11-22 01:12:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303474309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:12:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894294549] [2024-11-22 01:12:31,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 01:12:31,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:12:31,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:12:31,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 01:12:31,288 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 01:12:31,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:12:31,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 01:12:31,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-22 01:12:31,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:12:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-22 01:12:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894294549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:12:31,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:12:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-22 01:12:31,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287078398] [2024-11-22 01:12:31,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:12:31,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 01:12:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:12:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 01:12:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-22 01:12:31,455 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-11-22 01:12:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:12:31,539 INFO L93 Difference]: Finished difference Result 154 states and 183 transitions. [2024-11-22 01:12:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:12:31,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 99 [2024-11-22 01:12:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:12:31,540 INFO L225 Difference]: With dead ends: 154 [2024-11-22 01:12:31,541 INFO L226 Difference]: Without dead ends: 135 [2024-11-22 01:12:31,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-22 01:12:31,541 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:12:31,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 178 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:12:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-22 01:12:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-11-22 01:12:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 34 states have call successors, (34), 16 states have call predecessors, (34), 16 states have return successors, (33), 29 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-22 01:12:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2024-11-22 01:12:31,568 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 99 [2024-11-22 01:12:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:12:31,568 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2024-11-22 01:12:31,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-11-22 01:12:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2024-11-22 01:12:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-22 01:12:31,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:12:31,570 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:12:31,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 01:12:31,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 01:12:31,770 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:12:31,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:12:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1149721345, now seen corresponding path program 2 times [2024-11-22 01:12:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:12:31,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179508071] [2024-11-22 01:12:31,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:12:31,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:12:31,782 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:12:31,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:12:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-22 01:12:32,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:12:32,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179508071] [2024-11-22 01:12:32,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179508071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:12:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230556307] [2024-11-22 01:12:32,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:12:32,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:12:32,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:12:32,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 01:12:32,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:12:32,177 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:12:32,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 01:12:32,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-22 01:12:32,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:12:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-22 01:12:33,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230556307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:12:33,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:12:33,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 27 [2024-11-22 01:12:33,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037898718] [2024-11-22 01:12:33,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:12:33,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 01:12:33,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:12:33,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 01:12:33,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-11-22 01:12:33,226 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 17 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 17 states have call predecessors, (45), 17 states have call successors, (45) [2024-11-22 01:12:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:12:33,748 INFO L93 Difference]: Finished difference Result 150 states and 175 transitions. [2024-11-22 01:12:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 01:12:33,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 17 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 17 states have call predecessors, (45), 17 states have call successors, (45) Word has length 102 [2024-11-22 01:12:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:12:33,750 INFO L225 Difference]: With dead ends: 150 [2024-11-22 01:12:33,750 INFO L226 Difference]: Without dead ends: 116 [2024-11-22 01:12:33,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2024-11-22 01:12:33,751 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 01:12:33,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 383 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 01:12:33,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-22 01:12:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2024-11-22 01:12:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-22 01:12:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2024-11-22 01:12:33,775 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 102 [2024-11-22 01:12:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:12:33,776 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2024-11-22 01:12:33,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 17 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 17 states have call predecessors, (45), 17 states have call successors, (45) [2024-11-22 01:12:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2024-11-22 01:12:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-22 01:12:33,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:12:33,777 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:12:33,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 01:12:33,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 01:12:33,978 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:12:33,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:12:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1779279917, now seen corresponding path program 2 times [2024-11-22 01:12:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:12:33,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877626198] [2024-11-22 01:12:33,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:12:33,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:12:33,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:12:33,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:12:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-22 01:12:34,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:12:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877626198] [2024-11-22 01:12:34,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877626198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:12:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8640611] [2024-11-22 01:12:34,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:12:34,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:34,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:12:34,159 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:12:34,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 01:12:34,206 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:12:34,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:12:34,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:12:34,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-22 01:12:34,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:12:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-22 01:12:34,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8640611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:12:34,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:12:34,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-11-22 01:12:34,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8620786] [2024-11-22 01:12:34,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:12:34,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 01:12:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:12:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 01:12:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-22 01:12:34,454 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-22 01:12:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:12:34,534 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2024-11-22 01:12:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 01:12:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 114 [2024-11-22 01:12:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:12:34,535 INFO L225 Difference]: With dead ends: 122 [2024-11-22 01:12:34,535 INFO L226 Difference]: Without dead ends: 114 [2024-11-22 01:12:34,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-22 01:12:34,536 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:12:34,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:12:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-22 01:12:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-22 01:12:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 74 states have internal predecessors, (79), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-22 01:12:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2024-11-22 01:12:34,560 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 114 [2024-11-22 01:12:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:12:34,562 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2024-11-22 01:12:34,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-22 01:12:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2024-11-22 01:12:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-22 01:12:34,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:12:34,563 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:12:34,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 01:12:34,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:34,764 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:12:34,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:12:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash 289773103, now seen corresponding path program 1 times [2024-11-22 01:12:34,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:12:34,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378014706] [2024-11-22 01:12:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:12:34,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:12:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:12:34,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178775431] [2024-11-22 01:12:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:12:34,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:12:34,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:12:34,804 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:12:34,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 01:12:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:12:34,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-22 01:12:34,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:12:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 35 proven. 103 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-22 01:12:35,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:13:11,548 WARN L286 SmtUtils]: Spent 9.41s on a formula simplification that was a NOOP. DAG size: 380 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)