./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i --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-scaling/divbin_unwindbound20.i -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 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 01:17:29,056 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 01:17:29,141 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 01:17:29,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 01:17:29,149 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 01:17:29,190 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 01:17:29,191 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 01:17:29,192 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 01:17:29,193 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 01:17:29,194 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 01:17:29,195 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 01:17:29,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 01:17:29,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 01:17:29,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 01:17:29,200 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 01:17:29,200 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 01:17:29,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 01:17:29,201 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 01:17:29,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 01:17:29,202 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 01:17:29,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 01:17:29,202 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 01:17:29,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 01:17:29,203 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 01:17:29,203 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 01:17:29,204 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 01:17:29,204 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 01:17:29,204 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 01:17:29,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 01:17:29,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 01:17:29,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 01:17:29,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 01:17:29,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:17:29,207 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 01:17:29,207 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 01:17:29,207 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 01:17:29,207 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 01:17:29,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 01:17:29,208 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 01:17:29,208 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 01:17:29,208 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 01:17:29,209 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 01:17:29,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 [2024-11-22 01:17:29,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 01:17:29,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 01:17:29,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 01:17:29,498 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 01:17:29,499 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 01:17:29,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2024-11-22 01:17:31,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 01:17:31,197 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 01:17:31,198 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2024-11-22 01:17:31,205 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32aecc6d9/f7f25cf913e44fd5995583a64245c979/FLAG79574e815 [2024-11-22 01:17:31,216 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32aecc6d9/f7f25cf913e44fd5995583a64245c979 [2024-11-22 01:17:31,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 01:17:31,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 01:17:31,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 01:17:31,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 01:17:31,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 01:17:31,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40da4fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31, skipping insertion in model container [2024-11-22 01:17:31,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,252 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 01:17:31,421 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i[950,963] [2024-11-22 01:17:31,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:17:31,449 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 01:17:31,461 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i[950,963] [2024-11-22 01:17:31,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:17:31,484 INFO L204 MainTranslator]: Completed translation [2024-11-22 01:17:31,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31 WrapperNode [2024-11-22 01:17:31,485 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 01:17:31,486 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 01:17:31,486 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 01:17:31,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 01:17:31,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,513 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2024-11-22 01:17:31,514 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 01:17:31,514 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 01:17:31,514 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 01:17:31,514 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 01:17:31,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,525 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,534 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 01:17:31,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,537 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,542 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 01:17:31,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 01:17:31,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 01:17:31,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 01:17:31,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (1/1) ... [2024-11-22 01:17:31,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:17:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:17:31,578 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 01:17:31,582 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 01:17:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 01:17:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-22 01:17:31,632 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-22 01:17:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 01:17:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 01:17:31,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 01:17:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 01:17:31,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 01:17:31,693 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 01:17:31,697 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 01:17:31,864 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-22 01:17:31,864 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 01:17:31,878 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 01:17:31,878 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-22 01:17:31,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:17:31 BoogieIcfgContainer [2024-11-22 01:17:31,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 01:17:31,882 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 01:17:31,882 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 01:17:31,885 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 01:17:31,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:17:31" (1/3) ... [2024-11-22 01:17:31,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eef2cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:17:31, skipping insertion in model container [2024-11-22 01:17:31,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:17:31" (2/3) ... [2024-11-22 01:17:31,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eef2cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:17:31, skipping insertion in model container [2024-11-22 01:17:31,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:17:31" (3/3) ... [2024-11-22 01:17:31,890 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2024-11-22 01:17:31,908 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 01:17:31,908 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 01:17:31,973 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 01:17:31,983 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;@7db7eb65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 01:17:31,983 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 01:17:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 01:17:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-22 01:17:31,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:17:31,995 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:17:31,996 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:17:32,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:17:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2024-11-22 01:17:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:17:32,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630860308] [2024-11-22 01:17:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:32,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:17:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:17:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 01:17:32,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:17:32,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630860308] [2024-11-22 01:17:32,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630860308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:17:32,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685385983] [2024-11-22 01:17:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:32,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:17:32,178 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 01:17:32,180 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 01:17:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:17:32,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-22 01:17:32,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:17:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 01:17:32,272 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:17:32,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685385983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:17:32,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:17:32,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-22 01:17:32,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36314475] [2024-11-22 01:17:32,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:17:32,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 01:17:32,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:17:32,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 01:17:32,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:17:32,304 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 01:17:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:17:32,321 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-11-22 01:17:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 01:17:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-22 01:17:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:17:32,330 INFO L225 Difference]: With dead ends: 53 [2024-11-22 01:17:32,330 INFO L226 Difference]: Without dead ends: 24 [2024-11-22 01:17:32,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 01:17:32,336 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 01:17:32,336 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 01:17:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-22 01:17:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-22 01:17:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 01:17:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-22 01:17:32,367 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2024-11-22 01:17:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:17:32,368 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-22 01:17:32,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 01:17:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-11-22 01:17:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-22 01:17:32,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:17:32,372 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:17:32,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 01:17:32,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-22 01:17:32,577 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:17:32,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:17:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2024-11-22 01:17:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:17:32,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836588252] [2024-11-22 01:17:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:32,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:17:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:17:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:17:32,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:17:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836588252] [2024-11-22 01:17:32,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836588252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:17:32,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:17:32,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 01:17:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494278369] [2024-11-22 01:17:32,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:17:32,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 01:17:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:17:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 01:17:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 01:17:32,696 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 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 01:17:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:17:32,721 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-22 01:17:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 01:17:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 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 21 [2024-11-22 01:17:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:17:32,723 INFO L225 Difference]: With dead ends: 38 [2024-11-22 01:17:32,723 INFO L226 Difference]: Without dead ends: 26 [2024-11-22 01:17:32,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 01:17:32,725 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:17:32,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:17:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-22 01:17:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-22 01:17:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 01:17:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-11-22 01:17:32,731 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2024-11-22 01:17:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:17:32,732 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-11-22 01:17:32,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 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 01:17:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-11-22 01:17:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-22 01:17:32,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:17:32,734 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:17:32,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 01:17:32,734 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:17:32,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:17:32,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2024-11-22 01:17:32,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:17:32,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480613692] [2024-11-22 01:17:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:32,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:17:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:17:32,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207577990] [2024-11-22 01:17:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:32,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:32,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:17:32,798 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 01:17:32,800 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 01:17:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:17:32,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:17:32,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:17:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:17:33,002 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:17:33,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:17:33,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480613692] [2024-11-22 01:17:33,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:17:33,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207577990] [2024-11-22 01:17:33,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207577990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:17:33,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:17:33,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:17:33,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349510242] [2024-11-22 01:17:33,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:17:33,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:17:33,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:17:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:17:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:17:33,019 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 01:17:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:17:33,101 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-11-22 01:17:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:17:33,102 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), 2 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 22 [2024-11-22 01:17:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:17:33,104 INFO L225 Difference]: With dead ends: 38 [2024-11-22 01:17:33,105 INFO L226 Difference]: Without dead ends: 35 [2024-11-22 01:17:33,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 01:17:33,107 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:17:33,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 82 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:17:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-22 01:17:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-22 01:17:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 01:17:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-22 01:17:33,120 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2024-11-22 01:17:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:17:33,120 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-22 01:17:33,120 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), 2 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 01:17:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-22 01:17:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-22 01:17:33,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:17:33,122 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:17:33,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 01:17:33,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-22 01:17:33,323 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:17:33,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:17:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2024-11-22 01:17:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:17:33,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638082621] [2024-11-22 01:17:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:33,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:17:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:17:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:17:33,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:17:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638082621] [2024-11-22 01:17:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638082621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:17:33,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:17:33,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 01:17:33,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138242359] [2024-11-22 01:17:33,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:17:33,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 01:17:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:17:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 01:17:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 01:17:33,815 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 01:17:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:17:33,838 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-11-22 01:17:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 01:17:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-22 01:17:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:17:33,840 INFO L225 Difference]: With dead ends: 61 [2024-11-22 01:17:33,840 INFO L226 Difference]: Without dead ends: 36 [2024-11-22 01:17:33,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 01:17:33,842 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:17:33,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:17:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-22 01:17:33,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-22 01:17:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 01:17:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-22 01:17:33,849 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 31 [2024-11-22 01:17:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:17:33,851 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-22 01:17:33,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 01:17:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-22 01:17:33,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-22 01:17:33,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:17:33,853 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:17:33,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 01:17:33,853 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:17:33,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:17:33,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2073553820, now seen corresponding path program 1 times [2024-11-22 01:17:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:17:33,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297807975] [2024-11-22 01:17:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:17:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:17:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 01:17:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:17:33,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297807975] [2024-11-22 01:17:33,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297807975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:17:33,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998033805] [2024-11-22 01:17:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:33,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:33,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:17:33,983 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 01:17:33,985 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 01:17:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:17:34,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 01:17:34,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:17:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 01:17:34,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:17:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 01:17:34,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998033805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:17:34,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:17:34,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-22 01:17:34,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908984913] [2024-11-22 01:17:34,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:17:34,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 01:17:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:17:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 01:17:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-22 01:17:34,166 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-22 01:17:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:17:34,233 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-11-22 01:17:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 01:17:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2024-11-22 01:17:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:17:34,237 INFO L225 Difference]: With dead ends: 76 [2024-11-22 01:17:34,237 INFO L226 Difference]: Without dead ends: 55 [2024-11-22 01:17:34,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-22 01:17:34,238 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:17:34,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 119 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:17:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-22 01:17:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2024-11-22 01:17:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 01:17:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-22 01:17:34,254 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2024-11-22 01:17:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:17:34,254 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-22 01:17:34,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-22 01:17:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-22 01:17:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-22 01:17:34,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:17:34,255 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:17:34,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 01:17:34,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:34,456 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:17:34,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:17:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2024-11-22 01:17:34,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:17:34,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393511133] [2024-11-22 01:17:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:34,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:17:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:17:34,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125417136] [2024-11-22 01:17:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:17:34,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:34,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:17:34,511 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 01:17:34,513 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 01:17:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:17:34,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 01:17:34,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:17:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:17:34,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:17:47,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:17:47,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393511133] [2024-11-22 01:17:47,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:17:47,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125417136] [2024-11-22 01:17:47,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125417136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:17:47,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:17:47,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-22 01:17:47,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915623835] [2024-11-22 01:17:47,359 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 01:17:47,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 01:17:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:17:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 01:17:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=147, Unknown=3, NotChecked=0, Total=182 [2024-11-22 01:17:47,364 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 01:17:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:17:47,526 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-11-22 01:17:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 01:17:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-11-22 01:17:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:17:47,528 INFO L225 Difference]: With dead ends: 55 [2024-11-22 01:17:47,528 INFO L226 Difference]: Without dead ends: 52 [2024-11-22 01:17:47,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=38, Invalid=169, Unknown=3, NotChecked=0, Total=210 [2024-11-22 01:17:47,529 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:17:47,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 152 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:17:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-22 01:17:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-22 01:17:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 01:17:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-11-22 01:17:47,538 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 34 [2024-11-22 01:17:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:17:47,538 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-11-22 01:17:47,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 01:17:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-11-22 01:17:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-22 01:17:47,539 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:17:47,540 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:17:47,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 01:17:47,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:47,743 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:17:47,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:17:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 2 times [2024-11-22 01:17:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:17:47,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907810040] [2024-11-22 01:17:47,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:17:47,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:17:47,827 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:17:47,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:17:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 01:17:48,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:17:48,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907810040] [2024-11-22 01:17:48,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907810040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:17:48,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421394594] [2024-11-22 01:17:48,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:17:48,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:17:48,731 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 01:17:48,732 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 01:17:48,835 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:17:48,835 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:17:48,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 01:17:48,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:17:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 01:17:49,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:17:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 01:17:53,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421394594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:17:53,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:17:53,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 15] total 30 [2024-11-22 01:17:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497938378] [2024-11-22 01:17:53,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:17:53,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 01:17:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:17:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 01:17:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-11-22 01:17:53,170 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 24 states have internal predecessors, (68), 10 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-22 01:17:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:17:54,299 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2024-11-22 01:17:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 01:17:54,300 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 24 states have internal predecessors, (68), 10 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 43 [2024-11-22 01:17:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:17:54,301 INFO L225 Difference]: With dead ends: 108 [2024-11-22 01:17:54,301 INFO L226 Difference]: Without dead ends: 62 [2024-11-22 01:17:54,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 01:17:54,302 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-22 01:17:54,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 300 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-22 01:17:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-22 01:17:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2024-11-22 01:17:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 01:17:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-22 01:17:54,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2024-11-22 01:17:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:17:54,313 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-22 01:17:54,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 24 states have internal predecessors, (68), 10 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-22 01:17:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-22 01:17:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-22 01:17:54,315 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:17:54,315 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:17:54,322 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 01:17:54,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:54,518 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:17:54,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:17:54,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 3 times [2024-11-22 01:17:54,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:17:54,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412658396] [2024-11-22 01:17:54,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:17:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:17:54,594 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 01:17:54,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:17:54,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870274062] [2024-11-22 01:17:54,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:17:54,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:17:54,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:17:54,599 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 01:17:54,600 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 01:17:55,112 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 01:17:55,112 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:17:55,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-22 01:17:55,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:17:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 01:17:56,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:18:35,074 WARN L286 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-22 01:18:55,832 WARN L286 SmtUtils]: Spent 8.63s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-22 01:19:04,009 WARN L286 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)