./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono6_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/loops-crafted-1/Mono6_1.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 d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 17:54:05,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 17:54:05,597 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 17:54:05,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 17:54:05,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 17:54:05,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 17:54:05,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 17:54:05,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 17:54:05,622 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 17:54:05,622 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 17:54:05,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 17:54:05,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 17:54:05,623 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 17:54:05,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 17:54:05,623 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 17:54:05,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 17:54:05,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 17:54:05,624 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 17:54:05,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 17:54:05,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 17:54:05,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 17:54:05,624 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 17:54:05,625 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:54:05,625 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 17:54:05,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 17:54:05,626 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 17:54:05,626 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 17:54:05,626 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 17:54:05,626 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 17:54:05,626 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 -> d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 [2025-03-16 17:54:05,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 17:54:05,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 17:54:05,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 17:54:05,838 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 17:54:05,838 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 17:54:05,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2025-03-16 17:54:06,954 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae1d47ab5/3665d3d9240d466c9c06d636b7be258e/FLAG4ecad0eab [2025-03-16 17:54:07,215 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 17:54:07,216 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2025-03-16 17:54:07,221 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae1d47ab5/3665d3d9240d466c9c06d636b7be258e/FLAG4ecad0eab [2025-03-16 17:54:07,231 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae1d47ab5/3665d3d9240d466c9c06d636b7be258e [2025-03-16 17:54:07,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 17:54:07,234 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 17:54:07,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 17:54:07,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 17:54:07,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 17:54:07,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d9df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07, skipping insertion in model container [2025-03-16 17:54:07,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,249 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 17:54:07,334 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/loops-crafted-1/Mono6_1.c[311,324] [2025-03-16 17:54:07,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:54:07,349 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 17:54:07,356 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/loops-crafted-1/Mono6_1.c[311,324] [2025-03-16 17:54:07,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:54:07,366 INFO L204 MainTranslator]: Completed translation [2025-03-16 17:54:07,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07 WrapperNode [2025-03-16 17:54:07,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 17:54:07,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 17:54:07,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 17:54:07,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 17:54:07,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,384 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2025-03-16 17:54:07,384 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 17:54:07,385 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 17:54:07,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 17:54:07,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 17:54:07,390 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,390 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,390 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,396 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]. [2025-03-16 17:54:07,396 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,396 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,398 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,398 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,399 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 17:54:07,400 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 17:54:07,403 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 17:54:07,403 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 17:54:07,404 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (1/1) ... [2025-03-16 17:54:07,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:54:07,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:07,429 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) [2025-03-16 17:54:07,435 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 [2025-03-16 17:54:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 17:54:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 17:54:07,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 17:54:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 17:54:07,485 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 17:54:07,487 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 17:54:07,587 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-16 17:54:07,589 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 17:54:07,595 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 17:54:07,597 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 17:54:07,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:54:07 BoogieIcfgContainer [2025-03-16 17:54:07,598 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 17:54:07,600 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 17:54:07,600 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 17:54:07,604 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 17:54:07,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 05:54:07" (1/3) ... [2025-03-16 17:54:07,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510677d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:54:07, skipping insertion in model container [2025-03-16 17:54:07,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:07" (2/3) ... [2025-03-16 17:54:07,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510677d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:54:07, skipping insertion in model container [2025-03-16 17:54:07,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:54:07" (3/3) ... [2025-03-16 17:54:07,607 INFO L128 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2025-03-16 17:54:07,618 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 17:54:07,620 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Mono6_1.c that has 1 procedures, 10 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-16 17:54:07,659 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 17:54:07,669 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;@10386bd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 17:54:07,669 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 17:54:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-03-16 17:54:07,674 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:07,675 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-03-16 17:54:07,675 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:07,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1226331, now seen corresponding path program 1 times [2025-03-16 17:54:07,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:07,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755719120] [2025-03-16 17:54:07,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:07,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-16 17:54:07,752 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-16 17:54:07,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:07,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:07,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755719120] [2025-03-16 17:54:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755719120] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:54:07,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:54:07,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 17:54:07,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5842377] [2025-03-16 17:54:07,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:54:07,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 17:54:07,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:07,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 17:54:07,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:54:07,908 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:07,929 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2025-03-16 17:54:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 17:54:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2025-03-16 17:54:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:07,934 INFO L225 Difference]: With dead ends: 22 [2025-03-16 17:54:07,934 INFO L226 Difference]: Without dead ends: 10 [2025-03-16 17:54:07,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:54:07,938 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:07,940 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-03-16 17:54:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2025-03-16 17:54:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2025-03-16 17:54:07,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2025-03-16 17:54:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:07,959 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2025-03-16 17:54:07,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2025-03-16 17:54:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 17:54:07,960 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:07,960 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:54:07,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 17:54:07,960 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:07,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:07,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2001820570, now seen corresponding path program 1 times [2025-03-16 17:54:07,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:07,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901235868] [2025-03-16 17:54:07,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:07,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:07,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 17:54:07,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 17:54:07,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:07,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:08,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:08,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901235868] [2025-03-16 17:54:08,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901235868] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:08,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53120280] [2025-03-16 17:54:08,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:08,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:08,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:08,140 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) [2025-03-16 17:54:08,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 17:54:08,167 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 17:54:08,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 17:54:08,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:08,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:08,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 17:54:08,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:08,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:08,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53120280] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:08,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:08,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2025-03-16 17:54:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12639809] [2025-03-16 17:54:08,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:08,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 17:54:08,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:08,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 17:54:08,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-16 17:54:08,322 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:08,433 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2025-03-16 17:54:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 17:54:08,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 17:54:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:08,433 INFO L225 Difference]: With dead ends: 27 [2025-03-16 17:54:08,433 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 17:54:08,434 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:54:08,434 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:08,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 17:54:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-16 17:54:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-03-16 17:54:08,440 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2025-03-16 17:54:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:08,440 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-03-16 17:54:08,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-03-16 17:54:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 17:54:08,441 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:08,441 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2025-03-16 17:54:08,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 17:54:08,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:08,642 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:08,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash -269127236, now seen corresponding path program 1 times [2025-03-16 17:54:08,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:08,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168795383] [2025-03-16 17:54:08,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:08,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:08,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 17:54:08,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 17:54:08,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:08,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:08,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:08,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168795383] [2025-03-16 17:54:08,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168795383] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:08,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394762845] [2025-03-16 17:54:08,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:08,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:08,738 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) [2025-03-16 17:54:08,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 17:54:08,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 17:54:08,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 17:54:08,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:08,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:08,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 17:54:08,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:08,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:08,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394762845] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:08,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:08,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 9 [2025-03-16 17:54:08,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630916479] [2025-03-16 17:54:08,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:08,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 17:54:08,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:08,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 17:54:08,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2025-03-16 17:54:08,883 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:08,961 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2025-03-16 17:54:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 17:54:08,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 17:54:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:08,962 INFO L225 Difference]: With dead ends: 34 [2025-03-16 17:54:08,962 INFO L226 Difference]: Without dead ends: 25 [2025-03-16 17:54:08,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:54:08,963 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:08,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 10 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-16 17:54:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2025-03-16 17:54:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-03-16 17:54:08,967 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2025-03-16 17:54:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:08,967 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-03-16 17:54:08,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-03-16 17:54:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 17:54:08,967 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:08,968 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2025-03-16 17:54:08,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:09,168 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 [2025-03-16 17:54:09,168 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:09,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1473683099, now seen corresponding path program 2 times [2025-03-16 17:54:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:09,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199213490] [2025-03-16 17:54:09,169 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:09,173 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-16 17:54:09,175 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 4 of 16 statements. [2025-03-16 17:54:09,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 17:54:09,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 17:54:09,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:09,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199213490] [2025-03-16 17:54:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199213490] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:54:09,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:54:09,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 17:54:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924080245] [2025-03-16 17:54:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:54:09,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 17:54:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:09,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 17:54:09,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:54:09,260 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:09,274 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2025-03-16 17:54:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 17:54:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 17:54:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:09,275 INFO L225 Difference]: With dead ends: 30 [2025-03-16 17:54:09,275 INFO L226 Difference]: Without dead ends: 27 [2025-03-16 17:54:09,275 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:54:09,276 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:09,277 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-16 17:54:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-16 17:54:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2025-03-16 17:54:09,284 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2025-03-16 17:54:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:09,285 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2025-03-16 17:54:09,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2025-03-16 17:54:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 17:54:09,285 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:09,286 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1] [2025-03-16 17:54:09,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 17:54:09,286 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:09,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash -265406331, now seen corresponding path program 2 times [2025-03-16 17:54:09,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:09,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666390481] [2025-03-16 17:54:09,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:09,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:09,292 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-16 17:54:09,300 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 17:54:09,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:09,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:09,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666390481] [2025-03-16 17:54:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666390481] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530909587] [2025-03-16 17:54:09,439 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:09,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:09,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:09,441 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) [2025-03-16 17:54:09,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 17:54:09,463 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-16 17:54:09,473 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 17:54:09,473 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:09,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:09,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 17:54:09,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:09,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 17:54:09,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530909587] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:09,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:09,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2025-03-16 17:54:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468507475] [2025-03-16 17:54:09,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:09,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 17:54:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:09,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 17:54:09,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2025-03-16 17:54:09,861 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:12,101 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2025-03-16 17:54:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 17:54:12,102 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-16 17:54:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:12,103 INFO L225 Difference]: With dead ends: 83 [2025-03-16 17:54:12,103 INFO L226 Difference]: Without dead ends: 76 [2025-03-16 17:54:12,103 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=992, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 17:54:12,104 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:12,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-16 17:54:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-16 17:54:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2025-03-16 17:54:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2025-03-16 17:54:12,120 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 25 [2025-03-16 17:54:12,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:12,120 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2025-03-16 17:54:12,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2025-03-16 17:54:12,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 17:54:12,121 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:12,121 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1] [2025-03-16 17:54:12,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:12,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:12,326 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:12,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1633576442, now seen corresponding path program 3 times [2025-03-16 17:54:12,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:12,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357487445] [2025-03-16 17:54:12,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:12,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:12,334 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 15 equivalence classes. [2025-03-16 17:54:12,341 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 7 of 46 statements. [2025-03-16 17:54:12,342 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 17:54:12,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-16 17:54:12,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357487445] [2025-03-16 17:54:12,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357487445] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891408403] [2025-03-16 17:54:12,396 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:12,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:12,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:12,398 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) [2025-03-16 17:54:12,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 17:54:12,418 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 15 equivalence classes. [2025-03-16 17:54:12,423 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 7 of 46 statements. [2025-03-16 17:54:12,423 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 17:54:12,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:12,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 17:54:12,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2025-03-16 17:54:12,487 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 17:54:12,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891408403] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:54:12,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 17:54:12,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-03-16 17:54:12,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905844913] [2025-03-16 17:54:12,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:54:12,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 17:54:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:12,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 17:54:12,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:54:12,489 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:12,531 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2025-03-16 17:54:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 17:54:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2025-03-16 17:54:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:12,533 INFO L225 Difference]: With dead ends: 102 [2025-03-16 17:54:12,534 INFO L226 Difference]: Without dead ends: 99 [2025-03-16 17:54:12,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2025-03-16 17:54:12,534 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:12,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-16 17:54:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 50. [2025-03-16 17:54:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2025-03-16 17:54:12,544 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 46 [2025-03-16 17:54:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:12,545 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2025-03-16 17:54:12,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2025-03-16 17:54:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 17:54:12,546 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:12,546 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1] [2025-03-16 17:54:12,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 17:54:12,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:12,746 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:12,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash -280312602, now seen corresponding path program 4 times [2025-03-16 17:54:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:12,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813626462] [2025-03-16 17:54:12,747 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:12,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:12,751 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-16 17:54:12,757 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 17:54:12,758 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:12,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 176 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 17:54:12,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:12,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813626462] [2025-03-16 17:54:12,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813626462] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:12,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486670072] [2025-03-16 17:54:12,868 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:12,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:12,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:12,870 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) [2025-03-16 17:54:12,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 17:54:12,890 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-16 17:54:12,902 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 17:54:12,903 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:12,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:12,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-16 17:54:12,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:13,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 17:54:13,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486670072] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:13,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:13,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 20, 16] total 42 [2025-03-16 17:54:13,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357876441] [2025-03-16 17:54:13,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:13,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-16 17:54:13,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:13,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-16 17:54:13,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 17:54:13,827 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:32,625 WARN L286 SmtUtils]: Spent 17.47s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-16 17:54:37,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 17:54:49,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 17:54:53,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 17:54:56,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 17:55:14,925 WARN L286 SmtUtils]: Spent 17.53s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-16 17:55:17,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 17:55:21,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 17:55:31,544 WARN L286 SmtUtils]: Spent 9.78s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-16 17:55:48,383 WARN L286 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-16 17:55:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:55:55,488 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2025-03-16 17:55:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-16 17:55:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-16 17:55:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:55:55,489 INFO L225 Difference]: With dead ends: 146 [2025-03-16 17:55:55,489 INFO L226 Difference]: Without dead ends: 119 [2025-03-16 17:55:55,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 68.2s TimeCoverageRelationStatistics Valid=1274, Invalid=3282, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 17:55:55,491 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:55:55,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 34.1s Time] [2025-03-16 17:55:55,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-03-16 17:55:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2025-03-16 17:55:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2025-03-16 17:55:55,508 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 49 [2025-03-16 17:55:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:55:55,508 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2025-03-16 17:55:55,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:55:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2025-03-16 17:55:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-03-16 17:55:55,509 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:55:55,510 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1] [2025-03-16 17:55:55,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 17:55:55,711 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 [2025-03-16 17:55:55,712 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:55:55,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:55:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1490637124, now seen corresponding path program 5 times [2025-03-16 17:55:55,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:55:55,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768224888] [2025-03-16 17:55:55,712 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:55:55,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:55:55,717 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 73 statements into 24 equivalence classes. [2025-03-16 17:55:55,721 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 9 of 73 statements. [2025-03-16 17:55:55,721 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 17:55:55,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 442 proven. 3 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2025-03-16 17:55:55,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:55,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768224888] [2025-03-16 17:55:55,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768224888] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:55,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128297233] [2025-03-16 17:55:55,769 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:55:55,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:55,771 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) [2025-03-16 17:55:55,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 17:55:55,798 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 73 statements into 24 equivalence classes. [2025-03-16 17:55:55,802 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 9 of 73 statements. [2025-03-16 17:55:55,802 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 17:55:55,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:55,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 17:55:55,803 INFO L279 TraceCheckSpWp]: Computing forward predicates...