./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/egcd2-ll_unwindbound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:00:41,222 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:00:41,276 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:00:41,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:00:41,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:00:41,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:00:41,298 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:00:41,298 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:00:41,298 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:00:41,298 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:00:41,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:00:41,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:00:41,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:00:41,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:00:41,299 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:00:41,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:00:41,300 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:00:41,300 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:00:41,300 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:00:41,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:00:41,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:00:41,301 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:00:41,301 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:00:41,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:00:41,301 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2025-03-08 05:00:41,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:00:41,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:00:41,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:00:41,528 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:00:41,528 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:00:41,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2025-03-08 05:00:42,643 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51df86cc4/664771167a3f4672a8e10f86ded80cb8/FLAG5e04b76eb [2025-03-08 05:00:42,861 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:00:42,862 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2025-03-08 05:00:42,869 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51df86cc4/664771167a3f4672a8e10f86ded80cb8/FLAG5e04b76eb [2025-03-08 05:00:43,215 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51df86cc4/664771167a3f4672a8e10f86ded80cb8 [2025-03-08 05:00:43,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:00:43,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:00:43,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:00:43,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:00:43,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:00:43,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aed9358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43, skipping insertion in model container [2025-03-08 05:00:43,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,242 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:00:43,363 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/egcd2-ll_unwindbound50.c[490,503] [2025-03-08 05:00:43,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:00:43,394 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:00:43,402 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/egcd2-ll_unwindbound50.c[490,503] [2025-03-08 05:00:43,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:00:43,421 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:00:43,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43 WrapperNode [2025-03-08 05:00:43,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:00:43,424 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:00:43,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:00:43,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:00:43,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,444 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2025-03-08 05:00:43,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:00:43,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:00:43,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:00:43,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:00:43,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,459 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,465 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]. [2025-03-08 05:00:43,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,472 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:00:43,480 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:00:43,480 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:00:43,480 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:00:43,481 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (1/1) ... [2025-03-08 05:00:43,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:00:43,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:43,506 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) [2025-03-08 05:00:43,511 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 [2025-03-08 05:00:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:00:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 05:00:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 05:00:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:00:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:00:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:00:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-08 05:00:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-08 05:00:43,567 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:00:43,568 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:00:43,683 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-03-08 05:00:43,683 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:00:43,690 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:00:43,690 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:00:43,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:00:43 BoogieIcfgContainer [2025-03-08 05:00:43,691 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:00:43,692 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:00:43,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:00:43,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:00:43,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:00:43" (1/3) ... [2025-03-08 05:00:43,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3028a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:00:43, skipping insertion in model container [2025-03-08 05:00:43,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:00:43" (2/3) ... [2025-03-08 05:00:43,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3028a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:00:43, skipping insertion in model container [2025-03-08 05:00:43,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:00:43" (3/3) ... [2025-03-08 05:00:43,697 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2025-03-08 05:00:43,710 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:00:43,711 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound50.c that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 05:00:43,745 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:00:43,756 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;@39465adc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:00:43,758 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:00:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 05:00:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 05:00:43,767 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:43,767 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:43,767 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:43,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash 100709880, now seen corresponding path program 1 times [2025-03-08 05:00:43,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:43,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616510666] [2025-03-08 05:00:43,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:43,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:43,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 05:00:43,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 05:00:43,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:43,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 05:00:43,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:43,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616510666] [2025-03-08 05:00:43,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616510666] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:43,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350231187] [2025-03-08 05:00:43,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:43,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:43,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:43,894 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) [2025-03-08 05:00:43,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:00:43,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 05:00:43,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 05:00:43,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:43,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:43,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 05:00:43,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 05:00:43,996 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:00:43,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350231187] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:00:43,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:00:43,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 05:00:43,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848169964] [2025-03-08 05:00:43,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:00:44,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 05:00:44,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:44,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 05:00:44,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:00:44,014 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:00:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:44,025 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2025-03-08 05:00:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 05:00:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2025-03-08 05:00:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:44,032 INFO L225 Difference]: With dead ends: 65 [2025-03-08 05:00:44,034 INFO L226 Difference]: Without dead ends: 30 [2025-03-08 05:00:44,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:00:44,038 INFO L435 NwaCegarLoop]: 45 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, 45 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 [2025-03-08 05:00:44,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:00:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-08 05:00:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-08 05:00:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-08 05:00:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2025-03-08 05:00:44,065 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2025-03-08 05:00:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:44,065 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2025-03-08 05:00:44,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:00:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2025-03-08 05:00:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-08 05:00:44,067 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:44,067 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:44,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:00:44,270 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 [2025-03-08 05:00:44,270 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:44,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1726789354, now seen corresponding path program 1 times [2025-03-08 05:00:44,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:44,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972884573] [2025-03-08 05:00:44,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:44,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:44,277 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 05:00:44,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 05:00:44,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:44,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:00:44,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:44,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972884573] [2025-03-08 05:00:44,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972884573] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:00:44,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:00:44,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 05:00:44,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104229606] [2025-03-08 05:00:44,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:00:44,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 05:00:44,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:44,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 05:00:44,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 05:00:44,382 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:00:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:44,403 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-08 05:00:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 05:00:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-03-08 05:00:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:44,404 INFO L225 Difference]: With dead ends: 40 [2025-03-08 05:00:44,404 INFO L226 Difference]: Without dead ends: 32 [2025-03-08 05:00:44,404 INFO L434 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 [2025-03-08 05:00:44,405 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 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 [2025-03-08 05:00:44,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:00:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-08 05:00:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-03-08 05:00:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-08 05:00:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2025-03-08 05:00:44,411 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2025-03-08 05:00:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:44,412 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2025-03-08 05:00:44,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:00:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2025-03-08 05:00:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 05:00:44,413 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:44,413 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:44,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:00:44,414 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:44,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2044305484, now seen corresponding path program 1 times [2025-03-08 05:00:44,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:44,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399225996] [2025-03-08 05:00:44,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:44,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:44,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 05:00:44,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 05:00:44,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:44,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:00:44,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:44,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399225996] [2025-03-08 05:00:44,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399225996] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:44,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764121919] [2025-03-08 05:00:44,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:44,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:44,548 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) [2025-03-08 05:00:44,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:00:44,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 05:00:44,593 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 05:00:44,593 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:44,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:44,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 05:00:44,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:00:44,805 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:00:44,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764121919] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:00:44,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:00:44,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2025-03-08 05:00:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336499958] [2025-03-08 05:00:44,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:00:44,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 05:00:44,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:44,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 05:00:44,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:00:44,806 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:00:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:44,891 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2025-03-08 05:00:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:00:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2025-03-08 05:00:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:44,892 INFO L225 Difference]: With dead ends: 49 [2025-03-08 05:00:44,892 INFO L226 Difference]: Without dead ends: 47 [2025-03-08 05:00:44,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:00:44,893 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:44,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:00:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-08 05:00:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2025-03-08 05:00:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-08 05:00:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2025-03-08 05:00:44,900 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 30 [2025-03-08 05:00:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:44,900 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2025-03-08 05:00:44,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:00:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2025-03-08 05:00:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 05:00:44,900 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:44,900 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:44,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:00:45,101 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 [2025-03-08 05:00:45,101 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:45,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash -886820372, now seen corresponding path program 1 times [2025-03-08 05:00:45,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:45,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244604373] [2025-03-08 05:00:45,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:45,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:45,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:00:45,124 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:00:45,124 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:45,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:00:45,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369181795] [2025-03-08 05:00:45,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:45,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:45,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:45,127 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) [2025-03-08 05:00:45,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:00:45,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:00:45,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:00:45,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:45,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:45,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:00:45,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:00:45,210 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:00:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:45,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244604373] [2025-03-08 05:00:45,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:00:45,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369181795] [2025-03-08 05:00:45,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369181795] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:00:45,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:00:45,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:00:45,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710597164] [2025-03-08 05:00:45,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:00:45,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:00:45,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:45,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:00:45,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:00:45,212 INFO L87 Difference]: Start difference. First operand 45 states and 63 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:00:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:45,254 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2025-03-08 05:00:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:00:45,254 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2025-03-08 05:00:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:45,257 INFO L225 Difference]: With dead ends: 66 [2025-03-08 05:00:45,257 INFO L226 Difference]: Without dead ends: 64 [2025-03-08 05:00:45,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:00:45,258 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:45,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:00:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-08 05:00:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2025-03-08 05:00:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-08 05:00:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2025-03-08 05:00:45,272 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 32 [2025-03-08 05:00:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:45,272 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2025-03-08 05:00:45,272 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:00:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2025-03-08 05:00:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 05:00:45,275 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:45,275 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:45,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 05:00:45,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:45,476 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:45,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:45,476 INFO L85 PathProgramCache]: Analyzing trace with hash -276176331, now seen corresponding path program 1 times [2025-03-08 05:00:45,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:45,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248316226] [2025-03-08 05:00:45,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:45,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:45,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 05:00:45,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 05:00:45,489 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:45,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:00:45,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:45,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248316226] [2025-03-08 05:00:45,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248316226] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:45,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642454456] [2025-03-08 05:00:45,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:45,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:45,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:45,573 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) [2025-03-08 05:00:45,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:00:45,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 05:00:45,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 05:00:45,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:45,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:45,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:00:45,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:00:45,691 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:00:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642454456] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:00:45,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:00:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-03-08 05:00:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865155934] [2025-03-08 05:00:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:00:45,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:00:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:45,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:00:45,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:00:45,692 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 05:00:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:45,734 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2025-03-08 05:00:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:00:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2025-03-08 05:00:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:45,736 INFO L225 Difference]: With dead ends: 63 [2025-03-08 05:00:45,736 INFO L226 Difference]: Without dead ends: 59 [2025-03-08 05:00:45,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:00:45,737 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:45,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:00:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-08 05:00:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2025-03-08 05:00:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-08 05:00:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2025-03-08 05:00:45,745 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 35 [2025-03-08 05:00:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:45,745 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2025-03-08 05:00:45,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 05:00:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2025-03-08 05:00:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 05:00:45,746 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:45,746 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:45,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 05:00:45,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:45,947 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:45,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash -247836027, now seen corresponding path program 1 times [2025-03-08 05:00:45,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:45,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370037858] [2025-03-08 05:00:45,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:45,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:45,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 05:00:45,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 05:00:45,957 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:45,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:00:46,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:46,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370037858] [2025-03-08 05:00:46,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370037858] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:00:46,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:00:46,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:00:46,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694596091] [2025-03-08 05:00:46,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:00:46,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:00:46,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:46,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:00:46,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:00:46,007 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:00:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:46,041 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2025-03-08 05:00:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:00:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2025-03-08 05:00:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:46,043 INFO L225 Difference]: With dead ends: 84 [2025-03-08 05:00:46,043 INFO L226 Difference]: Without dead ends: 58 [2025-03-08 05:00:46,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:00:46,045 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:46,045 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:00:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-08 05:00:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-03-08 05:00:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-08 05:00:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2025-03-08 05:00:46,054 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 35 [2025-03-08 05:00:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:46,054 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2025-03-08 05:00:46,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:00:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2025-03-08 05:00:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 05:00:46,055 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:46,055 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:46,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 05:00:46,056 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:46,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1535941731, now seen corresponding path program 1 times [2025-03-08 05:00:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:46,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471033126] [2025-03-08 05:00:46,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:46,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:46,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 05:00:46,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 05:00:46,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:46,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:00:46,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293993296] [2025-03-08 05:00:46,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:46,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:46,076 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) [2025-03-08 05:00:46,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:00:46,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 05:00:46,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 05:00:46,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:46,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:46,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 05:00:46,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 05:00:46,255 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:00:46,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:46,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471033126] [2025-03-08 05:00:46,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:00:46,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293993296] [2025-03-08 05:00:46,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293993296] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:00:46,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:00:46,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:00:46,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3610765] [2025-03-08 05:00:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:00:46,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:00:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:46,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:00:46,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:00:46,257 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 05:00:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:46,298 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2025-03-08 05:00:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:00:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2025-03-08 05:00:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:46,299 INFO L225 Difference]: With dead ends: 65 [2025-03-08 05:00:46,299 INFO L226 Difference]: Without dead ends: 63 [2025-03-08 05:00:46,299 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:00:46,302 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:46,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:00:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-08 05:00:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2025-03-08 05:00:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-08 05:00:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2025-03-08 05:00:46,309 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 47 [2025-03-08 05:00:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:46,309 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2025-03-08 05:00:46,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 05:00:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2025-03-08 05:00:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-08 05:00:46,310 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:46,310 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:46,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:00:46,510 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 [2025-03-08 05:00:46,511 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:46,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash 101798249, now seen corresponding path program 1 times [2025-03-08 05:00:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:46,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631019723] [2025-03-08 05:00:46,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:46,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 05:00:46,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 05:00:46,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:46,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:00:46,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747331134] [2025-03-08 05:00:46,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:46,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:46,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:46,528 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) [2025-03-08 05:00:46,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:00:46,556 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 05:00:46,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 05:00:46,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:46,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:46,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 05:00:46,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:00:46,637 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:00:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:00:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631019723] [2025-03-08 05:00:46,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:00:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747331134] [2025-03-08 05:00:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747331134] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:00:46,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:00:46,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-03-08 05:00:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259726544] [2025-03-08 05:00:46,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:00:46,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 05:00:46,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:46,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 05:00:46,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:00:46,728 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 05:00:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:46,822 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2025-03-08 05:00:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 05:00:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2025-03-08 05:00:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:46,824 INFO L225 Difference]: With dead ends: 92 [2025-03-08 05:00:46,824 INFO L226 Difference]: Without dead ends: 90 [2025-03-08 05:00:46,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:00:46,825 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:46,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 219 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:00:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-08 05:00:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2025-03-08 05:00:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 05:00:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2025-03-08 05:00:46,834 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 55 [2025-03-08 05:00:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:46,834 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2025-03-08 05:00:46,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 05:00:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2025-03-08 05:00:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-08 05:00:46,835 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:46,835 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:46,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 05:00:47,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:47,036 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:47,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:47,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1244697335, now seen corresponding path program 1 times [2025-03-08 05:00:47,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:47,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515670413] [2025-03-08 05:00:47,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:47,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:47,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-08 05:00:47,044 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 05:00:47,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:47,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:00:47,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:47,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515670413] [2025-03-08 05:00:47,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515670413] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:47,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130330752] [2025-03-08 05:00:47,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:47,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:47,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:47,120 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) [2025-03-08 05:00:47,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:00:47,146 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-08 05:00:47,162 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 05:00:47,162 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:47,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:47,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:00:47,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:00:47,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:00:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:00:47,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130330752] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:00:47,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:00:47,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-03-08 05:00:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98492812] [2025-03-08 05:00:47,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:00:47,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:00:47,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:47,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:00:47,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:00:47,291 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-03-08 05:00:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:47,422 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2025-03-08 05:00:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:00:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 56 [2025-03-08 05:00:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:47,424 INFO L225 Difference]: With dead ends: 211 [2025-03-08 05:00:47,424 INFO L226 Difference]: Without dead ends: 203 [2025-03-08 05:00:47,424 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:00:47,425 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:47,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 194 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:00:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2025-03-08 05:00:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2025-03-08 05:00:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2025-03-08 05:00:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2025-03-08 05:00:47,450 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2025-03-08 05:00:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:47,450 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2025-03-08 05:00:47,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-03-08 05:00:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2025-03-08 05:00:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-08 05:00:47,451 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:47,451 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:47,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 05:00:47,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:47,655 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:47,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash 15645217, now seen corresponding path program 1 times [2025-03-08 05:00:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:47,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828111921] [2025-03-08 05:00:47,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:47,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:47,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-08 05:00:47,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 05:00:47,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:47,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-08 05:00:47,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:47,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828111921] [2025-03-08 05:00:47,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828111921] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:47,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298477505] [2025-03-08 05:00:47,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:47,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:47,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:47,753 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) [2025-03-08 05:00:47,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:00:47,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-08 05:00:47,800 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 05:00:47,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:47,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:47,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:00:47,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-08 05:00:47,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:00:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-08 05:00:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298477505] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:00:47,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:00:47,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-03-08 05:00:47,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109689129] [2025-03-08 05:00:47,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:00:47,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 05:00:47,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:47,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 05:00:47,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:00:47,913 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 05:00:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:48,056 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2025-03-08 05:00:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:00:48,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2025-03-08 05:00:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:48,058 INFO L225 Difference]: With dead ends: 279 [2025-03-08 05:00:48,058 INFO L226 Difference]: Without dead ends: 259 [2025-03-08 05:00:48,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:00:48,059 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:48,059 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 249 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:00:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2025-03-08 05:00:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2025-03-08 05:00:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-03-08 05:00:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2025-03-08 05:00:48,089 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2025-03-08 05:00:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:48,089 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2025-03-08 05:00:48,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 05:00:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2025-03-08 05:00:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-08 05:00:48,090 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:48,090 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:48,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 05:00:48,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 05:00:48,294 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:48,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash -351822558, now seen corresponding path program 1 times [2025-03-08 05:00:48,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:48,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955148977] [2025-03-08 05:00:48,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:48,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:48,302 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-08 05:00:48,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 05:00:48,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:48,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:00:48,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955148977] [2025-03-08 05:00:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955148977] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383099850] [2025-03-08 05:00:48,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:48,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:48,367 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) [2025-03-08 05:00:48,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:00:48,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-08 05:00:48,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 05:00:48,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:48,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:48,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:00:48,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:00:48,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:00:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:00:48,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383099850] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:00:48,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:00:48,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-03-08 05:00:48,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202447548] [2025-03-08 05:00:48,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:00:48,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:00:48,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:48,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:00:48,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:00:48,526 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-03-08 05:00:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:48,648 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2025-03-08 05:00:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:00:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 59 [2025-03-08 05:00:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:48,650 INFO L225 Difference]: With dead ends: 344 [2025-03-08 05:00:48,650 INFO L226 Difference]: Without dead ends: 248 [2025-03-08 05:00:48,650 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:00:48,651 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 68 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:48,651 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 179 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:00:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-03-08 05:00:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2025-03-08 05:00:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-03-08 05:00:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2025-03-08 05:00:48,681 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2025-03-08 05:00:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:48,681 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2025-03-08 05:00:48,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-03-08 05:00:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2025-03-08 05:00:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-08 05:00:48,681 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:48,682 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:48,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:00:48,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:48,887 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:48,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1287548176, now seen corresponding path program 1 times [2025-03-08 05:00:48,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:48,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040790286] [2025-03-08 05:00:48,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:48,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:48,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-08 05:00:48,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-08 05:00:48,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:48,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:00:48,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312749082] [2025-03-08 05:00:48,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:48,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:48,907 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) [2025-03-08 05:00:48,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:00:48,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-08 05:00:48,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-08 05:00:48,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:48,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:48,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 05:00:48,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-08 05:00:49,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:00:49,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:49,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040790286] [2025-03-08 05:00:49,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:00:49,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312749082] [2025-03-08 05:00:49,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312749082] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:49,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:00:49,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-03-08 05:00:49,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317420321] [2025-03-08 05:00:49,094 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:00:49,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 05:00:49,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:49,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 05:00:49,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:00:49,094 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-08 05:00:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:49,196 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2025-03-08 05:00:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:00:49,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2025-03-08 05:00:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:49,200 INFO L225 Difference]: With dead ends: 283 [2025-03-08 05:00:49,200 INFO L226 Difference]: Without dead ends: 278 [2025-03-08 05:00:49,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:00:49,200 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 10 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:49,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 213 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:00:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2025-03-08 05:00:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2025-03-08 05:00:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 183 states have (on average 1.185792349726776) internal successors, (217), 187 states have internal predecessors, (217), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-08 05:00:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2025-03-08 05:00:49,228 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2025-03-08 05:00:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:49,228 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2025-03-08 05:00:49,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-08 05:00:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2025-03-08 05:00:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-08 05:00:49,229 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:49,229 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:49,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 05:00:49,434 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,SelfDestructingSolverStorable11 [2025-03-08 05:00:49,434 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:49,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash 691051449, now seen corresponding path program 2 times [2025-03-08 05:00:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:49,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257270862] [2025-03-08 05:00:49,435 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:00:49,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:49,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-03-08 05:00:49,448 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-08 05:00:49,448 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:00:49,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:00:49,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413222990] [2025-03-08 05:00:49,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:00:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:49,451 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) [2025-03-08 05:00:49,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:00:49,477 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-03-08 05:00:49,494 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-08 05:00:49,495 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:00:49,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:49,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 05:00:49,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 05:00:49,655 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:00:49,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:49,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257270862] [2025-03-08 05:00:49,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:00:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413222990] [2025-03-08 05:00:49,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413222990] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:49,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:00:49,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-08 05:00:49,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79061706] [2025-03-08 05:00:49,738 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:00:49,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 05:00:49,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:49,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 05:00:49,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:00:49,739 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 05:00:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:49,846 INFO L93 Difference]: Finished difference Result 291 states and 357 transitions. [2025-03-08 05:00:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 05:00:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 69 [2025-03-08 05:00:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:49,848 INFO L225 Difference]: With dead ends: 291 [2025-03-08 05:00:49,848 INFO L226 Difference]: Without dead ends: 289 [2025-03-08 05:00:49,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:00:49,849 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 228 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 [2025-03-08 05:00:49,849 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 228 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:00:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2025-03-08 05:00:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2025-03-08 05:00:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 192 states have (on average 1.1770833333333333) internal successors, (226), 196 states have internal predecessors, (226), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-08 05:00:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 352 transitions. [2025-03-08 05:00:49,872 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 352 transitions. Word has length 69 [2025-03-08 05:00:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:49,872 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 352 transitions. [2025-03-08 05:00:49,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 05:00:49,873 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 352 transitions. [2025-03-08 05:00:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-08 05:00:49,874 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:49,874 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1, 1] [2025-03-08 05:00:49,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 05:00:50,074 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,SelfDestructingSolverStorable12 [2025-03-08 05:00:50,075 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:50,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash 239571152, now seen corresponding path program 3 times [2025-03-08 05:00:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:50,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137759450] [2025-03-08 05:00:50,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:00:50,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:50,080 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 74 statements into 5 equivalence classes. [2025-03-08 05:00:50,095 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 74 of 74 statements. [2025-03-08 05:00:50,095 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 05:00:50,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:00:50,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291194633] [2025-03-08 05:00:50,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:00:50,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:50,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:50,098 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) [2025-03-08 05:00:50,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:00:50,124 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 74 statements into 5 equivalence classes. [2025-03-08 05:00:50,139 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 54 of 74 statements. [2025-03-08 05:00:50,140 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 05:00:50,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:50,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 05:00:50,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-03-08 05:00:50,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:00:50,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:50,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137759450] [2025-03-08 05:00:50,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:00:50,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291194633] [2025-03-08 05:00:50,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291194633] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:00:50,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:00:50,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-03-08 05:00:50,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129620144] [2025-03-08 05:00:50,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:00:50,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:00:50,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:50,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:00:50,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:00:50,699 INFO L87 Difference]: Start difference. First operand 288 states and 352 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-08 05:00:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:50,925 INFO L93 Difference]: Finished difference Result 303 states and 366 transitions. [2025-03-08 05:00:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:00:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 74 [2025-03-08 05:00:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:50,927 INFO L225 Difference]: With dead ends: 303 [2025-03-08 05:00:50,927 INFO L226 Difference]: Without dead ends: 299 [2025-03-08 05:00:50,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:00:50,928 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:50,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 281 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:00:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2025-03-08 05:00:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2025-03-08 05:00:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 200 states have (on average 1.165) internal successors, (233), 203 states have internal predecessors, (233), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-08 05:00:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 359 transitions. [2025-03-08 05:00:50,958 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 359 transitions. Word has length 74 [2025-03-08 05:00:50,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:50,958 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 359 transitions. [2025-03-08 05:00:50,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-08 05:00:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 359 transitions. [2025-03-08 05:00:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-08 05:00:50,959 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:50,959 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2025-03-08 05:00:50,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 05:00:51,159 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,SelfDestructingSolverStorable13 [2025-03-08 05:00:51,160 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:51,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash 852496708, now seen corresponding path program 1 times [2025-03-08 05:00:51,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:51,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975238704] [2025-03-08 05:00:51,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:51,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:51,164 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-03-08 05:00:51,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-03-08 05:00:51,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:51,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:00:51,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268165066] [2025-03-08 05:00:51,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:51,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:51,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:51,173 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) [2025-03-08 05:00:51,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:00:51,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-03-08 05:00:51,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-03-08 05:00:51,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:51,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:51,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-08 05:00:51,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2025-03-08 05:00:51,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:00:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-03-08 05:00:51,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975238704] [2025-03-08 05:00:51,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:00:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268165066] [2025-03-08 05:00:51,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268165066] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:00:51,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:00:51,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-03-08 05:00:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724942706] [2025-03-08 05:00:51,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:00:51,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:00:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:51,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:00:51,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:00:51,992 INFO L87 Difference]: Start difference. First operand 298 states and 359 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-03-08 05:00:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:54,182 INFO L93 Difference]: Finished difference Result 435 states and 581 transitions. [2025-03-08 05:00:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 05:00:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2025-03-08 05:00:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:54,185 INFO L225 Difference]: With dead ends: 435 [2025-03-08 05:00:54,185 INFO L226 Difference]: Without dead ends: 428 [2025-03-08 05:00:54,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:00:54,186 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 134 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:54,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 761 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-08 05:00:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2025-03-08 05:00:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 391. [2025-03-08 05:00:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 256 states have (on average 1.23046875) internal successors, (315), 259 states have internal predecessors, (315), 100 states have call successors, (100), 34 states have call predecessors, (100), 34 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2025-03-08 05:00:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 513 transitions. [2025-03-08 05:00:54,269 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 513 transitions. Word has length 80 [2025-03-08 05:00:54,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:54,269 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 513 transitions. [2025-03-08 05:00:54,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-03-08 05:00:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 513 transitions. [2025-03-08 05:00:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-08 05:00:54,270 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:54,270 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:54,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 05:00:54,474 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,SelfDestructingSolverStorable14 [2025-03-08 05:00:54,474 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:54,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:54,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2042434077, now seen corresponding path program 4 times [2025-03-08 05:00:54,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:54,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979149345] [2025-03-08 05:00:54,474 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:00:54,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:54,479 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-08 05:00:54,491 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 81 of 91 statements. [2025-03-08 05:00:54,491 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:00:54,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-03-08 05:00:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:00:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979149345] [2025-03-08 05:00:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979149345] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:00:54,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:00:54,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:00:54,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964948937] [2025-03-08 05:00:54,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:00:54,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:00:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:00:54,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:00:54,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:00:54,546 INFO L87 Difference]: Start difference. First operand 391 states and 513 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-03-08 05:00:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:00:54,657 INFO L93 Difference]: Finished difference Result 587 states and 831 transitions. [2025-03-08 05:00:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:00:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 91 [2025-03-08 05:00:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:00:54,659 INFO L225 Difference]: With dead ends: 587 [2025-03-08 05:00:54,660 INFO L226 Difference]: Without dead ends: 462 [2025-03-08 05:00:54,660 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:00:54,660 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:00:54,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 186 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:00:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2025-03-08 05:00:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 410. [2025-03-08 05:00:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 267 states have (on average 1.2397003745318351) internal successors, (331), 270 states have internal predecessors, (331), 108 states have call successors, (108), 34 states have call predecessors, (108), 34 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2025-03-08 05:00:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 545 transitions. [2025-03-08 05:00:54,714 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 545 transitions. Word has length 91 [2025-03-08 05:00:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:00:54,714 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 545 transitions. [2025-03-08 05:00:54,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-03-08 05:00:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 545 transitions. [2025-03-08 05:00:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-08 05:00:54,715 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:00:54,715 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:00:54,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-08 05:00:54,715 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:00:54,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:00:54,715 INFO L85 PathProgramCache]: Analyzing trace with hash 777061389, now seen corresponding path program 1 times [2025-03-08 05:00:54,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:00:54,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85082023] [2025-03-08 05:00:54,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:54,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:00:54,720 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-08 05:00:54,730 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-08 05:00:54,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:54,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:00:54,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38610101] [2025-03-08 05:00:54,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:00:54,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:00:54,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:00:54,734 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) [2025-03-08 05:00:54,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:00:54,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-08 05:00:54,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-08 05:00:54,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:00:54,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:00:54,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-08 05:00:54,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:00:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 39 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-03-08 05:00:55,531 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:23,161 WARN L286 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-03-08 05:01:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2025-03-08 05:01:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85082023] [2025-03-08 05:01:47,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38610101] [2025-03-08 05:01:47,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38610101] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:47,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:01:47,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2025-03-08 05:01:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309993218] [2025-03-08 05:01:47,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:47,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 05:01:47,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:47,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 05:01:47,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=538, Unknown=1, NotChecked=0, Total=650 [2025-03-08 05:01:47,381 INFO L87 Difference]: Start difference. First operand 410 states and 545 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 21 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2025-03-08 05:01:55,472 WARN L286 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-08 05:02:04,158 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-08 05:02:08,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-08 05:02:17,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-08 05:02:26,205 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 []