./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.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/bitvector/soft_float_3a.c.cil.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 14:03:31,345 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 14:03:31,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 14:03:31,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 14:03:31,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 14:03:31,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 14:03:31,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 14:03:31,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 14:03:31,430 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 14:03:31,430 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 14:03:31,431 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 14:03:31,431 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 14:03:31,431 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 14:03:31,431 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 14:03:31,432 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:31,432 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 14:03:31,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 14:03:31,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 14:03:31,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 14:03:31,434 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 -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2025-03-16 14:03:31,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 14:03:31,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 14:03:31,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 14:03:31,635 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 14:03:31,635 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 14:03:31,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2025-03-16 14:03:32,752 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ad56736/f95fb8d6ae2042ae9933e0038455144a/FLAG879272d2e [2025-03-16 14:03:32,946 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 14:03:32,956 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2025-03-16 14:03:32,968 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ad56736/f95fb8d6ae2042ae9933e0038455144a/FLAG879272d2e [2025-03-16 14:03:33,318 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ad56736/f95fb8d6ae2042ae9933e0038455144a [2025-03-16 14:03:33,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 14:03:33,321 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 14:03:33,321 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:33,322 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 14:03:33,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 14:03:33,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,328 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bf2cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33, skipping insertion in model container [2025-03-16 14:03:33,328 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,341 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 14:03:33,427 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/bitvector/soft_float_3a.c.cil.c[728,741] [2025-03-16 14:03:33,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:33,465 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 14:03:33,471 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/bitvector/soft_float_3a.c.cil.c[728,741] [2025-03-16 14:03:33,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:33,512 INFO L204 MainTranslator]: Completed translation [2025-03-16 14:03:33,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33 WrapperNode [2025-03-16 14:03:33,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:33,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:33,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 14:03:33,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 14:03:33,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,527 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,548 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2025-03-16 14:03:33,548 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:33,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 14:03:33,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 14:03:33,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 14:03:33,558 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,563 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,582 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 14:03:33,582 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,582 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,588 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,592 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 14:03:33,594 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 14:03:33,594 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 14:03:33,594 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 14:03:33,597 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (1/1) ... [2025-03-16 14:03:33,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:33,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:33,625 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 14:03:33,632 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 14:03:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 14:03:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 14:03:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-03-16 14:03:33,646 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-03-16 14:03:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 14:03:33,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 14:03:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 14:03:33,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 14:03:33,688 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 14:03:33,689 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 14:03:33,944 INFO L? ?]: Removed 64 outVars from TransFormulas that were not future-live. [2025-03-16 14:03:33,947 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 14:03:33,966 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 14:03:33,966 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 14:03:33,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:33 BoogieIcfgContainer [2025-03-16 14:03:33,966 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 14:03:33,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 14:03:33,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 14:03:33,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 14:03:33,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:03:33" (1/3) ... [2025-03-16 14:03:33,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0cec42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:33, skipping insertion in model container [2025-03-16 14:03:33,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:33" (2/3) ... [2025-03-16 14:03:33,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0cec42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:33, skipping insertion in model container [2025-03-16 14:03:33,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:33" (3/3) ... [2025-03-16 14:03:33,974 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2025-03-16 14:03:33,987 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 14:03:33,988 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_3a.c.cil.c that has 3 procedures, 69 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 14:03:34,035 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 14:03:34,044 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;@5618cc1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 14:03:34,044 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 14:03:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 62 states have internal predecessors, (94), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-16 14:03:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 14:03:34,056 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:34,056 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:34,057 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:34,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1401862080, now seen corresponding path program 1 times [2025-03-16 14:03:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:34,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471860274] [2025-03-16 14:03:34,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:34,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:34,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 14:03:34,166 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 14:03:34,167 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:34,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:03:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:34,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471860274] [2025-03-16 14:03:34,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471860274] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:34,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:34,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:34,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554978096] [2025-03-16 14:03:34,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:34,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:34,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:34,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:34,317 INFO L87 Difference]: Start difference. First operand has 69 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 62 states have internal predecessors, (94), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:34,363 INFO L93 Difference]: Finished difference Result 137 states and 212 transitions. [2025-03-16 14:03:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:34,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2025-03-16 14:03:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:34,369 INFO L225 Difference]: With dead ends: 137 [2025-03-16 14:03:34,369 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 14:03:34,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 14:03:34,372 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:34,373 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 179 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 14:03:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-03-16 14:03:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.456140350877193) internal successors, (83), 57 states have internal predecessors, (83), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 14:03:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2025-03-16 14:03:34,397 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 39 [2025-03-16 14:03:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:34,397 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2025-03-16 14:03:34,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2025-03-16 14:03:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:34,400 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:34,400 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:34,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 14:03:34,400 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:34,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1191539485, now seen corresponding path program 1 times [2025-03-16 14:03:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:34,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13533466] [2025-03-16 14:03:34,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:34,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:34,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:34,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:34,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:34,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:03:34,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:34,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13533466] [2025-03-16 14:03:34,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13533466] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:34,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:34,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:34,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671697440] [2025-03-16 14:03:34,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:34,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:34,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:34,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:34,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:34,544 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:34,580 INFO L93 Difference]: Finished difference Result 74 states and 103 transitions. [2025-03-16 14:03:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2025-03-16 14:03:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:34,582 INFO L225 Difference]: With dead ends: 74 [2025-03-16 14:03:34,582 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 14:03:34,582 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:34,583 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:34,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 250 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 14:03:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-03-16 14:03:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 14:03:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 91 transitions. [2025-03-16 14:03:34,592 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 91 transitions. Word has length 41 [2025-03-16 14:03:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:34,593 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 91 transitions. [2025-03-16 14:03:34,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 91 transitions. [2025-03-16 14:03:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:34,594 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:34,594 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:34,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 14:03:34,594 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:34,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash 551270850, now seen corresponding path program 1 times [2025-03-16 14:03:34,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:34,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114193954] [2025-03-16 14:03:34,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:34,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:34,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:34,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:34,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:34,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:34,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:34,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114193954] [2025-03-16 14:03:34,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114193954] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:34,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725793817] [2025-03-16 14:03:34,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:34,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:34,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:34,723 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 14:03:34,725 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 14:03:34,763 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:34,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:34,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:34,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:34,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:03:34,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:34,835 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:34,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725793817] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:34,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:34,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:03:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147986321] [2025-03-16 14:03:34,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:34,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:34,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:34,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:34,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:34,840 INFO L87 Difference]: Start difference. First operand 64 states and 91 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:34,947 INFO L93 Difference]: Finished difference Result 145 states and 211 transitions. [2025-03-16 14:03:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:34,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2025-03-16 14:03:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:34,949 INFO L225 Difference]: With dead ends: 145 [2025-03-16 14:03:34,949 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 14:03:34,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:34,950 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 19 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:34,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 193 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 14:03:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2025-03-16 14:03:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 68 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-16 14:03:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 108 transitions. [2025-03-16 14:03:34,959 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 108 transitions. Word has length 41 [2025-03-16 14:03:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:34,959 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 108 transitions. [2025-03-16 14:03:34,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 108 transitions. [2025-03-16 14:03:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 14:03:34,960 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:34,960 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:34,967 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 14:03:35,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:35,161 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:35,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1774003990, now seen corresponding path program 1 times [2025-03-16 14:03:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:35,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474492530] [2025-03-16 14:03:35,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:35,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 14:03:35,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 14:03:35,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:35,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:35,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474492530] [2025-03-16 14:03:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474492530] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862806508] [2025-03-16 14:03:35,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:35,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:35,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:35,251 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 14:03:35,252 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 14:03:35,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 14:03:35,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 14:03:35,306 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:35,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:35,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:35,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:35,344 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:35,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862806508] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:35,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:35,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:03:35,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762580594] [2025-03-16 14:03:35,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:35,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:35,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:35,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:35,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:35,346 INFO L87 Difference]: Start difference. First operand 76 states and 108 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:35,402 INFO L93 Difference]: Finished difference Result 160 states and 230 transitions. [2025-03-16 14:03:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2025-03-16 14:03:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:35,403 INFO L225 Difference]: With dead ends: 160 [2025-03-16 14:03:35,403 INFO L226 Difference]: Without dead ends: 90 [2025-03-16 14:03:35,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:35,404 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 14 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:35,404 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 209 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-16 14:03:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2025-03-16 14:03:35,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 72 states have internal predecessors, (101), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 114 transitions. [2025-03-16 14:03:35,436 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 114 transitions. Word has length 43 [2025-03-16 14:03:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:35,437 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 114 transitions. [2025-03-16 14:03:35,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 114 transitions. [2025-03-16 14:03:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 14:03:35,438 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:35,438 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:35,444 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 14:03:35,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-16 14:03:35,639 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:35,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash -262433085, now seen corresponding path program 1 times [2025-03-16 14:03:35,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:35,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919628354] [2025-03-16 14:03:35,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:35,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:35,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 14:03:35,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 14:03:35,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:35,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:35,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919628354] [2025-03-16 14:03:35,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919628354] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000165631] [2025-03-16 14:03:35,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:35,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:35,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:35,724 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 14:03:35,726 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 14:03:35,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 14:03:35,775 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 14:03:35,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:35,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:35,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:35,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:35,810 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:35,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000165631] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:35,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:35,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:03:35,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420405316] [2025-03-16 14:03:35,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:35,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:35,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:35,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:35,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:35,811 INFO L87 Difference]: Start difference. First operand 80 states and 114 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:35,861 INFO L93 Difference]: Finished difference Result 165 states and 238 transitions. [2025-03-16 14:03:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:35,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2025-03-16 14:03:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:35,862 INFO L225 Difference]: With dead ends: 165 [2025-03-16 14:03:35,863 INFO L226 Difference]: Without dead ends: 91 [2025-03-16 14:03:35,864 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:35,864 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 15 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:35,866 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 211 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-16 14:03:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2025-03-16 14:03:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2025-03-16 14:03:35,872 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 44 [2025-03-16 14:03:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:35,872 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2025-03-16 14:03:35,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2025-03-16 14:03:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:35,874 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:35,875 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:35,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 14:03:36,075 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 14:03:36,075 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:36,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1922829724, now seen corresponding path program 1 times [2025-03-16 14:03:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:36,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034975554] [2025-03-16 14:03:36,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:36,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:36,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:36,085 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:36,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:36,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:36,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034975554] [2025-03-16 14:03:36,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034975554] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:36,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422525787] [2025-03-16 14:03:36,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:36,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:36,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:36,153 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 14:03:36,155 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 14:03:36,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:36,198 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:36,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:36,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:36,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:36,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:36,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422525787] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:36,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:36,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-16 14:03:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350289907] [2025-03-16 14:03:36,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:36,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:03:36,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:36,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:03:36,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:36,323 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:03:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:36,464 INFO L93 Difference]: Finished difference Result 213 states and 314 transitions. [2025-03-16 14:03:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2025-03-16 14:03:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:36,466 INFO L225 Difference]: With dead ends: 213 [2025-03-16 14:03:36,466 INFO L226 Difference]: Without dead ends: 138 [2025-03-16 14:03:36,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:36,466 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 78 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:36,467 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 502 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-03-16 14:03:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 92. [2025-03-16 14:03:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.4819277108433735) internal successors, (123), 84 states have internal predecessors, (123), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 136 transitions. [2025-03-16 14:03:36,479 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 136 transitions. Word has length 45 [2025-03-16 14:03:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:36,480 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 136 transitions. [2025-03-16 14:03:36,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:03:36,480 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 136 transitions. [2025-03-16 14:03:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:03:36,481 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:36,481 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:36,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:36,681 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 14:03:36,682 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:36,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:36,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1149930047, now seen corresponding path program 1 times [2025-03-16 14:03:36,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:36,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059439949] [2025-03-16 14:03:36,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:36,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:36,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:36,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:36,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:36,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:36,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059439949] [2025-03-16 14:03:36,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059439949] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:36,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87785686] [2025-03-16 14:03:36,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:36,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:36,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:36,745 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 14:03:36,747 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 14:03:36,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:36,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:36,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:36,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:36,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:36,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:36,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:36,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87785686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:36,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:36,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-16 14:03:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048108443] [2025-03-16 14:03:36,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:36,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:03:36,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:36,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:03:36,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:36,900 INFO L87 Difference]: Start difference. First operand 92 states and 136 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:03:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:37,026 INFO L93 Difference]: Finished difference Result 226 states and 340 transitions. [2025-03-16 14:03:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:37,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2025-03-16 14:03:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:37,028 INFO L225 Difference]: With dead ends: 226 [2025-03-16 14:03:37,028 INFO L226 Difference]: Without dead ends: 140 [2025-03-16 14:03:37,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:37,029 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 87 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:37,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 499 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-03-16 14:03:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 98. [2025-03-16 14:03:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 90 states have internal predecessors, (135), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 148 transitions. [2025-03-16 14:03:37,045 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 148 transitions. Word has length 46 [2025-03-16 14:03:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:37,046 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 148 transitions. [2025-03-16 14:03:37,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:03:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 148 transitions. [2025-03-16 14:03:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 14:03:37,046 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:37,047 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:37,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:37,247 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 14:03:37,247 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:37,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1042901023, now seen corresponding path program 1 times [2025-03-16 14:03:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:37,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444582402] [2025-03-16 14:03:37,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:37,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:37,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:37,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:37,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:37,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:37,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444582402] [2025-03-16 14:03:37,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444582402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:37,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35978114] [2025-03-16 14:03:37,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:37,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:37,287 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 14:03:37,288 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 14:03:37,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:37,335 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:37,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:37,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:37,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:03:37,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 14:03:37,344 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:37,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35978114] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:37,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:37,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-03-16 14:03:37,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981655551] [2025-03-16 14:03:37,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:37,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:37,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:37,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:37,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:37,345 INFO L87 Difference]: Start difference. First operand 98 states and 148 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:37,385 INFO L93 Difference]: Finished difference Result 195 states and 301 transitions. [2025-03-16 14:03:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2025-03-16 14:03:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:37,386 INFO L225 Difference]: With dead ends: 195 [2025-03-16 14:03:37,386 INFO L226 Difference]: Without dead ends: 103 [2025-03-16 14:03:37,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 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 14:03:37,387 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 7 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:37,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 152 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-16 14:03:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2025-03-16 14:03:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.5) internal successors, (129), 87 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 142 transitions. [2025-03-16 14:03:37,397 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 142 transitions. Word has length 48 [2025-03-16 14:03:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:37,397 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 142 transitions. [2025-03-16 14:03:37,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 142 transitions. [2025-03-16 14:03:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 14:03:37,398 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:37,398 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:37,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 14:03:37,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:37,599 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:37,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1889516499, now seen corresponding path program 1 times [2025-03-16 14:03:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:37,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644759758] [2025-03-16 14:03:37,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:37,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:37,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:37,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:37,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:37,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:37,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644759758] [2025-03-16 14:03:37,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644759758] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:37,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145187515] [2025-03-16 14:03:37,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:37,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:37,656 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:37,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 14:03:37,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:37,701 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:37,701 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:37,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:37,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:03:37,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 14:03:37,712 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:37,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145187515] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:37,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:37,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-03-16 14:03:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840439203] [2025-03-16 14:03:37,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:37,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:37,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:37,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:37,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:37,713 INFO L87 Difference]: Start difference. First operand 95 states and 142 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:37,742 INFO L93 Difference]: Finished difference Result 192 states and 293 transitions. [2025-03-16 14:03:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2025-03-16 14:03:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:37,743 INFO L225 Difference]: With dead ends: 192 [2025-03-16 14:03:37,743 INFO L226 Difference]: Without dead ends: 103 [2025-03-16 14:03:37,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 1 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 14:03:37,744 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:37,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 154 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-16 14:03:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2025-03-16 14:03:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.4827586206896552) internal successors, (129), 88 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 142 transitions. [2025-03-16 14:03:37,749 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 142 transitions. Word has length 48 [2025-03-16 14:03:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:37,749 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 142 transitions. [2025-03-16 14:03:37,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 142 transitions. [2025-03-16 14:03:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:03:37,749 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:37,749 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:37,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:37,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:37,950 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:37,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -960783182, now seen corresponding path program 1 times [2025-03-16 14:03:37,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:37,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707112951] [2025-03-16 14:03:37,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:37,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:37,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:37,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:37,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:38,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707112951] [2025-03-16 14:03:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707112951] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192981975] [2025-03-16 14:03:38,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:38,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:38,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:38,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 14:03:38,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:38,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:38,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:38,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 14:03:38,113 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:38,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192981975] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:38,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:38,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:03:38,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501445964] [2025-03-16 14:03:38,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:38,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:38,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:38,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:38,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:38,114 INFO L87 Difference]: Start difference. First operand 96 states and 142 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:38,150 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2025-03-16 14:03:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2025-03-16 14:03:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:38,151 INFO L225 Difference]: With dead ends: 193 [2025-03-16 14:03:38,151 INFO L226 Difference]: Without dead ends: 103 [2025-03-16 14:03:38,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:38,151 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:38,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 157 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-16 14:03:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2025-03-16 14:03:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.4767441860465116) internal successors, (127), 87 states have internal predecessors, (127), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 140 transitions. [2025-03-16 14:03:38,158 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 140 transitions. Word has length 49 [2025-03-16 14:03:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:38,158 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 140 transitions. [2025-03-16 14:03:38,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 140 transitions. [2025-03-16 14:03:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:03:38,159 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:38,159 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:38,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 14:03:38,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 14:03:38,360 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:38,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1531525408, now seen corresponding path program 1 times [2025-03-16 14:03:38,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:38,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711971712] [2025-03-16 14:03:38,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:38,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:38,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:38,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:38,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:38,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711971712] [2025-03-16 14:03:38,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711971712] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:38,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140467172] [2025-03-16 14:03:38,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:38,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:38,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:38,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 14:03:38,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:38,503 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:38,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:03:38,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:38,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:38,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140467172] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:38,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:38,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2025-03-16 14:03:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879258339] [2025-03-16 14:03:38,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:38,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:03:38,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:38,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:03:38,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:03:38,576 INFO L87 Difference]: Start difference. First operand 95 states and 140 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:03:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:38,695 INFO L93 Difference]: Finished difference Result 217 states and 317 transitions. [2025-03-16 14:03:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:38,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2025-03-16 14:03:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:38,696 INFO L225 Difference]: With dead ends: 217 [2025-03-16 14:03:38,696 INFO L226 Difference]: Without dead ends: 128 [2025-03-16 14:03:38,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:38,698 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 41 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:38,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 272 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-16 14:03:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2025-03-16 14:03:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.425) internal successors, (114), 81 states have internal predecessors, (114), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2025-03-16 14:03:38,706 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 49 [2025-03-16 14:03:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:38,707 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2025-03-16 14:03:38,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:03:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2025-03-16 14:03:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 14:03:38,707 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:38,707 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:38,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:38,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:38,912 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:38,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1738472897, now seen corresponding path program 1 times [2025-03-16 14:03:38,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:38,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290390943] [2025-03-16 14:03:38,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:38,918 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:38,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:38,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:39,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290390943] [2025-03-16 14:03:39,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290390943] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:39,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:39,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-16 14:03:39,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566331304] [2025-03-16 14:03:39,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:39,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:03:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:39,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:03:39,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:03:39,065 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:39,146 INFO L93 Difference]: Finished difference Result 168 states and 244 transitions. [2025-03-16 14:03:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2025-03-16 14:03:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:39,149 INFO L225 Difference]: With dead ends: 168 [2025-03-16 14:03:39,149 INFO L226 Difference]: Without dead ends: 132 [2025-03-16 14:03:39,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:39,150 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 48 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:39,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 488 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:39,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-16 14:03:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2025-03-16 14:03:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.3949579831932772) internal successors, (166), 120 states have internal predecessors, (166), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-16 14:03:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2025-03-16 14:03:39,161 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 50 [2025-03-16 14:03:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:39,161 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2025-03-16 14:03:39,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2025-03-16 14:03:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 14:03:39,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:39,162 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:39,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-16 14:03:39,162 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:39,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash 721563233, now seen corresponding path program 1 times [2025-03-16 14:03:39,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:39,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171096161] [2025-03-16 14:03:39,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:39,167 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:03:39,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:03:39,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:03:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171096161] [2025-03-16 14:03:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171096161] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060608048] [2025-03-16 14:03:39,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:39,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:39,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 14:03:39,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:03:39,327 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:03:39,327 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:03:39,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:03:39,350 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:39,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060608048] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:39,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:39,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2025-03-16 14:03:39,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113642452] [2025-03-16 14:03:39,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:39,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:39,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:39,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:39,351 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:39,383 INFO L93 Difference]: Finished difference Result 150 states and 210 transitions. [2025-03-16 14:03:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2025-03-16 14:03:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:39,385 INFO L225 Difference]: With dead ends: 150 [2025-03-16 14:03:39,385 INFO L226 Difference]: Without dead ends: 144 [2025-03-16 14:03:39,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:39,386 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 0 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:39,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-16 14:03:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2025-03-16 14:03:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 133 states have internal predecessors, (180), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2025-03-16 14:03:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 204 transitions. [2025-03-16 14:03:39,395 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 204 transitions. Word has length 52 [2025-03-16 14:03:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:39,395 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 204 transitions. [2025-03-16 14:03:39,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 204 transitions. [2025-03-16 14:03:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 14:03:39,396 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:39,396 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:39,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:39,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 14:03:39,597 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:39,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:39,597 INFO L85 PathProgramCache]: Analyzing trace with hash 750192384, now seen corresponding path program 1 times [2025-03-16 14:03:39,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:39,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138321387] [2025-03-16 14:03:39,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:39,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:03:39,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:03:39,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 14:03:39,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138321387] [2025-03-16 14:03:39,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138321387] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:39,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:39,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349798807] [2025-03-16 14:03:39,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:39,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:39,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:39,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:39,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:39,679 INFO L87 Difference]: Start difference. First operand 144 states and 204 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:39,714 INFO L93 Difference]: Finished difference Result 150 states and 209 transitions. [2025-03-16 14:03:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2025-03-16 14:03:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:39,716 INFO L225 Difference]: With dead ends: 150 [2025-03-16 14:03:39,716 INFO L226 Difference]: Without dead ends: 134 [2025-03-16 14:03:39,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:39,716 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 1 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:39,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 403 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2025-03-16 14:03:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2025-03-16 14:03:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.360655737704918) internal successors, (166), 124 states have internal predecessors, (166), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2025-03-16 14:03:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 187 transitions. [2025-03-16 14:03:39,725 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 187 transitions. Word has length 52 [2025-03-16 14:03:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:39,726 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 187 transitions. [2025-03-16 14:03:39,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 187 transitions. [2025-03-16 14:03:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 14:03:39,727 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:39,727 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:39,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-16 14:03:39,728 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:39,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -432201278, now seen corresponding path program 1 times [2025-03-16 14:03:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:39,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32532783] [2025-03-16 14:03:39,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:39,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:39,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:39,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:03:39,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32532783] [2025-03-16 14:03:39,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32532783] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381093653] [2025-03-16 14:03:39,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:39,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:39,847 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:39,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 14:03:39,880 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:39,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:39,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:03:39,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:03:39,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 14:03:40,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381093653] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:40,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:40,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2025-03-16 14:03:40,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8830436] [2025-03-16 14:03:40,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:40,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:40,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:40,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:40,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:40,008 INFO L87 Difference]: Start difference. First operand 134 states and 187 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:40,065 INFO L93 Difference]: Finished difference Result 148 states and 201 transitions. [2025-03-16 14:03:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2025-03-16 14:03:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:40,066 INFO L225 Difference]: With dead ends: 148 [2025-03-16 14:03:40,066 INFO L226 Difference]: Without dead ends: 137 [2025-03-16 14:03:40,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:40,067 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 7 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:40,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 223 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-03-16 14:03:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2025-03-16 14:03:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 123 states have (on average 1.3577235772357723) internal successors, (167), 125 states have internal predecessors, (167), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2025-03-16 14:03:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 188 transitions. [2025-03-16 14:03:40,077 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 188 transitions. Word has length 53 [2025-03-16 14:03:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:40,077 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 188 transitions. [2025-03-16 14:03:40,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 188 transitions. [2025-03-16 14:03:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 14:03:40,078 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:40,078 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:40,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 14:03:40,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-16 14:03:40,279 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:40,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -303118559, now seen corresponding path program 1 times [2025-03-16 14:03:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:40,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949735143] [2025-03-16 14:03:40,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:40,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:40,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:40,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:40,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:40,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:40,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949735143] [2025-03-16 14:03:40,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949735143] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:40,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523935825] [2025-03-16 14:03:40,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:40,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:40,359 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:40,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 14:03:40,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 14:03:40,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 14:03:40,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:40,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:40,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 14:03:40,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:40,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:40,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523935825] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:40,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:40,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 14] total 28 [2025-03-16 14:03:40,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043140624] [2025-03-16 14:03:40,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:40,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 14:03:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:40,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 14:03:40,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2025-03-16 14:03:40,888 INFO L87 Difference]: Start difference. First operand 135 states and 188 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 24 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:03:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:42,388 INFO L93 Difference]: Finished difference Result 443 states and 665 transitions. [2025-03-16 14:03:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-16 14:03:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 24 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 53 [2025-03-16 14:03:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:42,390 INFO L225 Difference]: With dead ends: 443 [2025-03-16 14:03:42,390 INFO L226 Difference]: Without dead ends: 282 [2025-03-16 14:03:42,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 14:03:42,393 INFO L435 NwaCegarLoop]: 134 mSDtfsCounter, 214 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 2624 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:42,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 2624 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 14:03:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2025-03-16 14:03:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 149. [2025-03-16 14:03:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 134 states have (on average 1.3432835820895523) internal successors, (180), 137 states have internal predecessors, (180), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-16 14:03:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 216 transitions. [2025-03-16 14:03:42,412 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 216 transitions. Word has length 53 [2025-03-16 14:03:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:42,413 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 216 transitions. [2025-03-16 14:03:42,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 24 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:03:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 216 transitions. [2025-03-16 14:03:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 14:03:42,414 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:42,414 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:42,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:42,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-16 14:03:42,614 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:42,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:42,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1454196434, now seen corresponding path program 1 times [2025-03-16 14:03:42,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:42,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608154077] [2025-03-16 14:03:42,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:42,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:42,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 14:03:42,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 14:03:42,624 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:42,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:42,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608154077] [2025-03-16 14:03:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608154077] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107094694] [2025-03-16 14:03:42,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:42,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:42,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:42,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:42,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 14:03:42,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 14:03:42,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 14:03:42,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:42,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:42,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:03:42,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:42,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:42,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107094694] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:42,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:42,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-03-16 14:03:42,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400130720] [2025-03-16 14:03:42,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:42,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 14:03:42,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:42,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 14:03:42,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:03:42,974 INFO L87 Difference]: Start difference. First operand 149 states and 216 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:03:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,165 INFO L93 Difference]: Finished difference Result 374 states and 536 transitions. [2025-03-16 14:03:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 14:03:43,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2025-03-16 14:03:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,167 INFO L225 Difference]: With dead ends: 374 [2025-03-16 14:03:43,167 INFO L226 Difference]: Without dead ends: 235 [2025-03-16 14:03:43,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2025-03-16 14:03:43,168 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 247 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 473 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:43,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2025-03-16 14:03:43,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 161. [2025-03-16 14:03:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 146 states have (on average 1.3972602739726028) internal successors, (204), 149 states have internal predecessors, (204), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-16 14:03:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 240 transitions. [2025-03-16 14:03:43,181 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 240 transitions. Word has length 54 [2025-03-16 14:03:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,181 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 240 transitions. [2025-03-16 14:03:43,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:03:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 240 transitions. [2025-03-16 14:03:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 14:03:43,182 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,183 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:43,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:43,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 14:03:43,383 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1473053856, now seen corresponding path program 1 times [2025-03-16 14:03:43,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816141060] [2025-03-16 14:03:43,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:03:43,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:03:43,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 14:03:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816141060] [2025-03-16 14:03:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816141060] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:43,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:43,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176111358] [2025-03-16 14:03:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:43,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:43,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:43,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:43,498 INFO L87 Difference]: Start difference. First operand 161 states and 240 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,546 INFO L93 Difference]: Finished difference Result 189 states and 276 transitions. [2025-03-16 14:03:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2025-03-16 14:03:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,547 INFO L225 Difference]: With dead ends: 189 [2025-03-16 14:03:43,547 INFO L226 Difference]: Without dead ends: 178 [2025-03-16 14:03:43,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:43,548 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 5 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 406 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2025-03-16 14:03:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2025-03-16 14:03:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 150 states have (on average 1.3933333333333333) internal successors, (209), 153 states have internal predecessors, (209), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 9 states have call predecessors, (33), 7 states have call successors, (33) [2025-03-16 14:03:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 250 transitions. [2025-03-16 14:03:43,558 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 250 transitions. Word has length 58 [2025-03-16 14:03:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,558 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 250 transitions. [2025-03-16 14:03:43,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 250 transitions. [2025-03-16 14:03:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-16 14:03:43,559 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,559 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:43,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-16 14:03:43,559 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash -191557709, now seen corresponding path program 2 times [2025-03-16 14:03:43,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249605706] [2025-03-16 14:03:43,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:43,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,565 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-03-16 14:03:43,576 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 14:03:43,576 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:03:43,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:43,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249605706] [2025-03-16 14:03:43,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249605706] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085818184] [2025-03-16 14:03:43,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:43,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:43,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:43,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 14:03:43,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-03-16 14:03:43,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 14:03:43,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:03:43,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 14:03:43,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:44,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:44,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085818184] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:44,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:44,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 16] total 37 [2025-03-16 14:03:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343797406] [2025-03-16 14:03:44,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:44,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-16 14:03:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:44,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-16 14:03:44,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 14:03:44,467 INFO L87 Difference]: Start difference. First operand 166 states and 250 transitions. Second operand has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 33 states have internal predecessors, (99), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:03:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:47,179 INFO L93 Difference]: Finished difference Result 556 states and 896 transitions. [2025-03-16 14:03:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-03-16 14:03:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 33 states have internal predecessors, (99), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 59 [2025-03-16 14:03:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:47,181 INFO L225 Difference]: With dead ends: 556 [2025-03-16 14:03:47,181 INFO L226 Difference]: Without dead ends: 393 [2025-03-16 14:03:47,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1089, Invalid=6921, Unknown=0, NotChecked=0, Total=8010 [2025-03-16 14:03:47,199 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 663 mSDsluCounter, 2445 mSDsCounter, 0 mSdLazyCounter, 2688 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:47,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 2550 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2688 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 14:03:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2025-03-16 14:03:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 174. [2025-03-16 14:03:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 155 states have (on average 1.3806451612903226) internal successors, (214), 159 states have internal predecessors, (214), 10 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (55), 11 states have call predecessors, (55), 9 states have call successors, (55) [2025-03-16 14:03:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 279 transitions. [2025-03-16 14:03:47,216 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 279 transitions. Word has length 59 [2025-03-16 14:03:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:47,216 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 279 transitions. [2025-03-16 14:03:47,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 33 states have internal predecessors, (99), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:03:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 279 transitions. [2025-03-16 14:03:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-16 14:03:47,217 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:47,218 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:47,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:47,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:47,418 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:47,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:47,419 INFO L85 PathProgramCache]: Analyzing trace with hash 175398830, now seen corresponding path program 2 times [2025-03-16 14:03:47,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:47,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338788828] [2025-03-16 14:03:47,419 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:47,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:47,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 66 statements into 2 equivalence classes. [2025-03-16 14:03:47,431 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 14:03:47,431 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:03:47,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:47,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:47,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338788828] [2025-03-16 14:03:47,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338788828] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:47,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984162438] [2025-03-16 14:03:47,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:47,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:47,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:47,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:47,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 14:03:47,629 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 66 statements into 2 equivalence classes. [2025-03-16 14:03:47,647 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 14:03:47,647 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:03:47,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:47,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 14:03:47,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:47,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:48,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984162438] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:48,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:48,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2025-03-16 14:03:48,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64522681] [2025-03-16 14:03:48,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:48,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 14:03:48,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:48,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 14:03:48,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 14:03:48,015 INFO L87 Difference]: Start difference. First operand 174 states and 279 transitions. Second operand has 38 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:03:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:48,251 INFO L93 Difference]: Finished difference Result 519 states and 784 transitions. [2025-03-16 14:03:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-16 14:03:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 66 [2025-03-16 14:03:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:48,253 INFO L225 Difference]: With dead ends: 519 [2025-03-16 14:03:48,253 INFO L226 Difference]: Without dead ends: 359 [2025-03-16 14:03:48,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=957, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 14:03:48,254 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 594 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:48,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 684 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2025-03-16 14:03:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 198. [2025-03-16 14:03:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 179 states have (on average 1.4636871508379887) internal successors, (262), 183 states have internal predecessors, (262), 10 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (55), 11 states have call predecessors, (55), 9 states have call successors, (55) [2025-03-16 14:03:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 327 transitions. [2025-03-16 14:03:48,276 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 327 transitions. Word has length 66 [2025-03-16 14:03:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:48,276 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 327 transitions. [2025-03-16 14:03:48,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:03:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 327 transitions. [2025-03-16 14:03:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-16 14:03:48,277 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:48,278 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:48,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:48,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:48,478 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:48,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash 505111398, now seen corresponding path program 1 times [2025-03-16 14:03:48,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:48,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139612312] [2025-03-16 14:03:48,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:48,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:48,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-16 14:03:48,493 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 14:03:48,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:48,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-16 14:03:48,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:48,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139612312] [2025-03-16 14:03:48,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139612312] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:48,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:48,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:48,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064588919] [2025-03-16 14:03:48,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:48,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:48,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:48,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:48,566 INFO L87 Difference]: Start difference. First operand 198 states and 327 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:48,605 INFO L93 Difference]: Finished difference Result 246 states and 389 transitions. [2025-03-16 14:03:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:48,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2025-03-16 14:03:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:48,607 INFO L225 Difference]: With dead ends: 246 [2025-03-16 14:03:48,607 INFO L226 Difference]: Without dead ends: 201 [2025-03-16 14:03:48,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:48,608 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:48,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 401 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2025-03-16 14:03:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2025-03-16 14:03:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 177 states have (on average 1.4689265536723164) internal successors, (260), 179 states have internal predecessors, (260), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 10 states have call predecessors, (33), 7 states have call successors, (33) [2025-03-16 14:03:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 301 transitions. [2025-03-16 14:03:48,624 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 301 transitions. Word has length 66 [2025-03-16 14:03:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:48,624 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 301 transitions. [2025-03-16 14:03:48,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 301 transitions. [2025-03-16 14:03:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-16 14:03:48,625 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:48,625 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:48,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-16 14:03:48,625 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:48,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:48,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1519009409, now seen corresponding path program 1 times [2025-03-16 14:03:48,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:48,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438280129] [2025-03-16 14:03:48,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:48,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:48,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-16 14:03:48,635 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-16 14:03:48,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:48,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-16 14:03:48,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:48,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438280129] [2025-03-16 14:03:48,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438280129] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:48,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287278358] [2025-03-16 14:03:48,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:48,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:48,719 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:48,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 14:03:48,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-16 14:03:48,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-16 14:03:48,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:48,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:48,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 14:03:48,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 14:03:49,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 14:03:49,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287278358] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:49,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:49,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 27 [2025-03-16 14:03:49,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78205404] [2025-03-16 14:03:49,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:49,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-16 14:03:49,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:49,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-16 14:03:49,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2025-03-16 14:03:49,381 INFO L87 Difference]: Start difference. First operand 193 states and 301 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 22 states have internal predecessors, (84), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:03:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:49,823 INFO L93 Difference]: Finished difference Result 384 states and 608 transitions. [2025-03-16 14:03:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 14:03:49,826 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 22 states have internal predecessors, (84), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2025-03-16 14:03:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:49,828 INFO L225 Difference]: With dead ends: 384 [2025-03-16 14:03:49,828 INFO L226 Difference]: Without dead ends: 281 [2025-03-16 14:03:49,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 14:03:49,829 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 287 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:49,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1250 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2025-03-16 14:03:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 211. [2025-03-16 14:03:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 188 states have (on average 1.4361702127659575) internal successors, (270), 192 states have internal predecessors, (270), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (81), 15 states have call predecessors, (81), 12 states have call successors, (81) [2025-03-16 14:03:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 364 transitions. [2025-03-16 14:03:49,847 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 364 transitions. Word has length 68 [2025-03-16 14:03:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:49,848 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 364 transitions. [2025-03-16 14:03:49,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 22 states have internal predecessors, (84), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:03:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 364 transitions. [2025-03-16 14:03:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 14:03:49,849 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:49,849 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:49,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 14:03:50,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-16 14:03:50,050 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:50,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1634051808, now seen corresponding path program 1 times [2025-03-16 14:03:50,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:50,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803490868] [2025-03-16 14:03:50,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:50,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:50,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 14:03:50,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:03:50,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:50,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:50,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:50,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803490868] [2025-03-16 14:03:50,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803490868] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:50,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582866667] [2025-03-16 14:03:50,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:50,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:50,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:50,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:50,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 14:03:50,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 14:03:50,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 14:03:50,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:50,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:50,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 14:03:50,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:50,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:50,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582866667] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:50,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:50,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-16 14:03:50,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517194875] [2025-03-16 14:03:50,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:50,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 14:03:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:50,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 14:03:50,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2025-03-16 14:03:50,481 INFO L87 Difference]: Start difference. First operand 211 states and 364 transitions. Second operand has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:03:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:50,920 INFO L93 Difference]: Finished difference Result 505 states and 842 transitions. [2025-03-16 14:03:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 14:03:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2025-03-16 14:03:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:50,923 INFO L225 Difference]: With dead ends: 505 [2025-03-16 14:03:50,923 INFO L226 Difference]: Without dead ends: 310 [2025-03-16 14:03:50,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2025-03-16 14:03:50,924 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 220 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:50,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 892 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 14:03:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2025-03-16 14:03:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 216. [2025-03-16 14:03:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 193 states have (on average 1.4300518134715026) internal successors, (276), 197 states have internal predecessors, (276), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (81), 15 states have call predecessors, (81), 12 states have call successors, (81) [2025-03-16 14:03:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 370 transitions. [2025-03-16 14:03:50,944 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 370 transitions. Word has length 69 [2025-03-16 14:03:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:50,944 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 370 transitions. [2025-03-16 14:03:50,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:03:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 370 transitions. [2025-03-16 14:03:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-16 14:03:50,946 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:50,946 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:50,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:51,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,150 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:51,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash -90684804, now seen corresponding path program 1 times [2025-03-16 14:03:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:51,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950906042] [2025-03-16 14:03:51,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:51,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-16 14:03:51,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-16 14:03:51,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-16 14:03:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950906042] [2025-03-16 14:03:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950906042] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:51,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246620495] [2025-03-16 14:03:51,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:51,280 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:51,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 14:03:51,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-16 14:03:51,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-16 14:03:51,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 14:03:51,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-16 14:03:51,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-16 14:03:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246620495] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:51,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:51,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-03-16 14:03:51,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266332702] [2025-03-16 14:03:51,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:51,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:03:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:51,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:03:51,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:51,437 INFO L87 Difference]: Start difference. First operand 216 states and 370 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:03:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:51,516 INFO L93 Difference]: Finished difference Result 223 states and 376 transitions. [2025-03-16 14:03:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 70 [2025-03-16 14:03:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:51,518 INFO L225 Difference]: With dead ends: 223 [2025-03-16 14:03:51,518 INFO L226 Difference]: Without dead ends: 181 [2025-03-16 14:03:51,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:51,519 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:51,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 629 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2025-03-16 14:03:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2025-03-16 14:03:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 160 states have (on average 1.45625) internal successors, (233), 165 states have internal predecessors, (233), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (58), 12 states have call predecessors, (58), 10 states have call successors, (58) [2025-03-16 14:03:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 302 transitions. [2025-03-16 14:03:51,536 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 302 transitions. Word has length 70 [2025-03-16 14:03:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:51,536 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 302 transitions. [2025-03-16 14:03:51,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:03:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 302 transitions. [2025-03-16 14:03:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 14:03:51,538 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:51,538 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:51,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:51,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,742 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:51,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash -253288361, now seen corresponding path program 3 times [2025-03-16 14:03:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:51,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26420956] [2025-03-16 14:03:51,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:03:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:51,749 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 13 equivalence classes. [2025-03-16 14:03:51,788 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:03:51,788 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-16 14:03:51,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:52,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:52,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26420956] [2025-03-16 14:03:52,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26420956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:52,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642815342] [2025-03-16 14:03:52,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:03:52,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:52,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:52,190 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:52,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 14:03:52,227 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 13 equivalence classes. [2025-03-16 14:03:52,390 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:03:52,390 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-03-16 14:03:52,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:52,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-16 14:03:52,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 3 proven. 111 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:03:52,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:53,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642815342] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:53,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:53,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 60 [2025-03-16 14:03:53,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134598835] [2025-03-16 14:03:53,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:53,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-03-16 14:03:53,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:53,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-03-16 14:03:53,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=3147, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 14:03:53,522 INFO L87 Difference]: Start difference. First operand 181 states and 302 transitions. Second operand has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 56 states have internal predecessors, (140), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 14:03:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:57,247 INFO L93 Difference]: Finished difference Result 698 states and 1120 transitions. [2025-03-16 14:03:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2025-03-16 14:03:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 56 states have internal predecessors, (140), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2025-03-16 14:03:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:57,250 INFO L225 Difference]: With dead ends: 698 [2025-03-16 14:03:57,250 INFO L226 Difference]: Without dead ends: 524 [2025-03-16 14:03:57,252 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1970, Invalid=8130, Unknown=0, NotChecked=0, Total=10100 [2025-03-16 14:03:57,253 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 1373 mSDsluCounter, 4559 mSDsCounter, 0 mSdLazyCounter, 4658 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 4706 SdHoareTripleChecker+Invalid, 5131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 4658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:57,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1381 Valid, 4706 Invalid, 5131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 4658 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-16 14:03:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2025-03-16 14:03:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 189. [2025-03-16 14:03:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 165 states have (on average 1.4424242424242424) internal successors, (238), 171 states have internal predecessors, (238), 13 states have call successors, (13), 3 states have call predecessors, (13), 10 states have return successors, (80), 14 states have call predecessors, (80), 12 states have call successors, (80) [2025-03-16 14:03:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 331 transitions. [2025-03-16 14:03:57,271 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 331 transitions. Word has length 71 [2025-03-16 14:03:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:57,271 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 331 transitions. [2025-03-16 14:03:57,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 56 states have internal predecessors, (140), 4 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 14:03:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 331 transitions. [2025-03-16 14:03:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 14:03:57,272 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:57,272 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:57,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-16 14:03:57,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:57,473 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:57,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:57,473 INFO L85 PathProgramCache]: Analyzing trace with hash -528035721, now seen corresponding path program 1 times [2025-03-16 14:03:57,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:57,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324382151] [2025-03-16 14:03:57,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:57,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:57,477 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-16 14:03:57,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 14:03:57,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:57,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 14:03:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324382151] [2025-03-16 14:03:57,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324382151] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:57,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:57,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:57,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508788491] [2025-03-16 14:03:57,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:57,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:57,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:57,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:57,527 INFO L87 Difference]: Start difference. First operand 189 states and 331 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:57,559 INFO L93 Difference]: Finished difference Result 201 states and 343 transitions. [2025-03-16 14:03:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 71 [2025-03-16 14:03:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:57,561 INFO L225 Difference]: With dead ends: 201 [2025-03-16 14:03:57,561 INFO L226 Difference]: Without dead ends: 196 [2025-03-16 14:03:57,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:57,562 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 1 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:57,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 240 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-03-16 14:03:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2025-03-16 14:03:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 171 states have (on average 1.4269005847953216) internal successors, (244), 177 states have internal predecessors, (244), 13 states have call successors, (13), 3 states have call predecessors, (13), 10 states have return successors, (80), 14 states have call predecessors, (80), 12 states have call successors, (80) [2025-03-16 14:03:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 337 transitions. [2025-03-16 14:03:57,576 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 337 transitions. Word has length 71 [2025-03-16 14:03:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:57,576 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 337 transitions. [2025-03-16 14:03:57,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 337 transitions. [2025-03-16 14:03:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-16 14:03:57,577 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:57,577 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:57,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-16 14:03:57,578 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:57,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:57,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2080565668, now seen corresponding path program 1 times [2025-03-16 14:03:57,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:57,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870687598] [2025-03-16 14:03:57,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:57,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:57,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-16 14:03:57,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-16 14:03:57,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:57,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-16 14:03:57,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:57,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870687598] [2025-03-16 14:03:57,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870687598] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:57,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692185549] [2025-03-16 14:03:57,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:57,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:57,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:57,660 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:57,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 14:03:57,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-16 14:03:57,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-16 14:03:57,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:57,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:57,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 14:03:57,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-03-16 14:03:57,746 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692185549] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:57,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 9 [2025-03-16 14:03:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807695023] [2025-03-16 14:03:57,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:57,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:03:57,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:57,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:03:57,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:57,747 INFO L87 Difference]: Start difference. First operand 195 states and 337 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:57,820 INFO L93 Difference]: Finished difference Result 306 states and 513 transitions. [2025-03-16 14:03:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2025-03-16 14:03:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:57,822 INFO L225 Difference]: With dead ends: 306 [2025-03-16 14:03:57,822 INFO L226 Difference]: Without dead ends: 251 [2025-03-16 14:03:57,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:57,823 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 46 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:57,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 541 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2025-03-16 14:03:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2025-03-16 14:03:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.4077669902912622) internal successors, (290), 209 states have internal predecessors, (290), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (118), 22 states have call predecessors, (118), 17 states have call successors, (118) [2025-03-16 14:03:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 426 transitions. [2025-03-16 14:03:57,851 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 426 transitions. Word has length 72 [2025-03-16 14:03:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:57,851 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 426 transitions. [2025-03-16 14:03:57,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 426 transitions. [2025-03-16 14:03:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-16 14:03:57,853 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:57,854 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:57,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:58,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-16 14:03:58,058 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:58,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1083493315, now seen corresponding path program 1 times [2025-03-16 14:03:58,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:58,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057120682] [2025-03-16 14:03:58,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:58,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:58,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-16 14:03:58,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-16 14:03:58,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:58,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-16 14:03:58,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:58,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057120682] [2025-03-16 14:03:58,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057120682] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:58,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:58,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-16 14:03:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136962571] [2025-03-16 14:03:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:58,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:03:58,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:58,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:03:58,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:58,333 INFO L87 Difference]: Start difference. First operand 235 states and 426 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:58,495 INFO L93 Difference]: Finished difference Result 293 states and 503 transitions. [2025-03-16 14:03:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2025-03-16 14:03:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:58,497 INFO L225 Difference]: With dead ends: 293 [2025-03-16 14:03:58,497 INFO L226 Difference]: Without dead ends: 282 [2025-03-16 14:03:58,498 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:58,498 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 31 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:58,498 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 640 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2025-03-16 14:03:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 259. [2025-03-16 14:03:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 230 states have (on average 1.391304347826087) internal successors, (320), 232 states have internal predecessors, (320), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (118), 23 states have call predecessors, (118), 17 states have call successors, (118) [2025-03-16 14:03:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 456 transitions. [2025-03-16 14:03:58,519 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 456 transitions. Word has length 72 [2025-03-16 14:03:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:58,519 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 456 transitions. [2025-03-16 14:03:58,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 456 transitions. [2025-03-16 14:03:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 14:03:58,521 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:58,521 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:58,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-16 14:03:58,522 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:58,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:58,522 INFO L85 PathProgramCache]: Analyzing trace with hash -143025165, now seen corresponding path program 1 times [2025-03-16 14:03:58,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:58,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109805214] [2025-03-16 14:03:58,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:58,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:58,526 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-16 14:03:58,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 14:03:58,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:58,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-16 14:03:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:58,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109805214] [2025-03-16 14:03:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109805214] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:58,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081360421] [2025-03-16 14:03:58,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:58,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:58,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:58,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:58,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:58,597 INFO L87 Difference]: Start difference. First operand 259 states and 456 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:58,657 INFO L93 Difference]: Finished difference Result 485 states and 821 transitions. [2025-03-16 14:03:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2025-03-16 14:03:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:58,658 INFO L225 Difference]: With dead ends: 485 [2025-03-16 14:03:58,658 INFO L226 Difference]: Without dead ends: 265 [2025-03-16 14:03:58,659 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:58,660 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:58,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 226 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2025-03-16 14:03:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 257. [2025-03-16 14:03:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 228 states have (on average 1.3859649122807018) internal successors, (316), 230 states have internal predecessors, (316), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (118), 23 states have call predecessors, (118), 17 states have call successors, (118) [2025-03-16 14:03:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 452 transitions. [2025-03-16 14:03:58,681 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 452 transitions. Word has length 75 [2025-03-16 14:03:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:58,681 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 452 transitions. [2025-03-16 14:03:58,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:03:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 452 transitions. [2025-03-16 14:03:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 14:03:58,682 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:58,682 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:58,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-03-16 14:03:58,683 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:58,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -663214063, now seen corresponding path program 1 times [2025-03-16 14:03:58,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:58,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250397118] [2025-03-16 14:03:58,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:58,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-16 14:03:58,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 14:03:58,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:58,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 14:03:58,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250397118] [2025-03-16 14:03:58,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250397118] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883648871] [2025-03-16 14:03:58,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:58,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:58,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:58,766 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:58,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 14:03:58,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-16 14:03:58,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 14:03:58,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:58,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:58,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 14:03:58,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 14:03:58,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 14:03:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883648871] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:59,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:59,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 16 [2025-03-16 14:03:59,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207814584] [2025-03-16 14:03:59,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:59,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:03:59,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:59,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:03:59,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:59,016 INFO L87 Difference]: Start difference. First operand 257 states and 452 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:03:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:59,150 INFO L93 Difference]: Finished difference Result 301 states and 503 transitions. [2025-03-16 14:03:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2025-03-16 14:03:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:59,152 INFO L225 Difference]: With dead ends: 301 [2025-03-16 14:03:59,152 INFO L226 Difference]: Without dead ends: 267 [2025-03-16 14:03:59,152 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:03:59,153 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 46 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:59,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 985 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2025-03-16 14:03:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 257. [2025-03-16 14:03:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 228 states have (on average 1.3771929824561404) internal successors, (314), 230 states have internal predecessors, (314), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (118), 23 states have call predecessors, (118), 17 states have call successors, (118) [2025-03-16 14:03:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 450 transitions. [2025-03-16 14:03:59,174 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 450 transitions. Word has length 75 [2025-03-16 14:03:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:59,174 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 450 transitions. [2025-03-16 14:03:59,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-16 14:03:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 450 transitions. [2025-03-16 14:03:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 14:03:59,176 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:59,176 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:59,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:59,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,380 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:59,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:59,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1660286416, now seen corresponding path program 1 times [2025-03-16 14:03:59,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935363582] [2025-03-16 14:03:59,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:59,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:59,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-16 14:03:59,429 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 14:03:59,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:59,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:03:59,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:59,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935363582] [2025-03-16 14:03:59,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935363582] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:59,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545237967] [2025-03-16 14:03:59,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:59,570 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:59,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 14:03:59,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-16 14:03:59,848 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 14:03:59,848 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:59,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:59,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 14:03:59,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 14:03:59,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-16 14:04:00,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545237967] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:00,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:04:00,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-03-16 14:04:00,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779182466] [2025-03-16 14:04:00,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:00,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 14:04:00,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:04:00,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 14:04:00,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2025-03-16 14:04:00,030 INFO L87 Difference]: Start difference. First operand 257 states and 450 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 14:04:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:00,678 INFO L93 Difference]: Finished difference Result 536 states and 915 transitions. [2025-03-16 14:04:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 14:04:00,679 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 75 [2025-03-16 14:04:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:00,680 INFO L225 Difference]: With dead ends: 536 [2025-03-16 14:04:00,681 INFO L226 Difference]: Without dead ends: 312 [2025-03-16 14:04:00,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 14:04:00,682 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 118 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:00,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1183 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 14:04:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2025-03-16 14:04:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 257. [2025-03-16 14:04:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 228 states have (on average 1.368421052631579) internal successors, (312), 230 states have internal predecessors, (312), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (118), 23 states have call predecessors, (118), 17 states have call successors, (118) [2025-03-16 14:04:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 448 transitions. [2025-03-16 14:04:00,701 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 448 transitions. Word has length 75 [2025-03-16 14:04:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:00,701 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 448 transitions. [2025-03-16 14:04:00,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 14:04:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 448 transitions. [2025-03-16 14:04:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-16 14:04:00,702 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:00,703 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:00,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:00,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:00,903 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:00,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:00,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1533484333, now seen corresponding path program 1 times [2025-03-16 14:04:00,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:04:00,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132423974] [2025-03-16 14:04:00,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:00,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:04:00,908 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-16 14:04:00,918 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 14:04:00,918 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:00,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:04:01,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:04:01,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132423974] [2025-03-16 14:04:01,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132423974] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:01,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879358630] [2025-03-16 14:04:01,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:01,172 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:01,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 14:04:01,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-16 14:04:01,230 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 14:04:01,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:01,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:01,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-16 14:04:01,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 106 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-16 14:04:01,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:04:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879358630] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:02,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:04:02,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 22] total 56 [2025-03-16 14:04:02,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769633148] [2025-03-16 14:04:02,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:02,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-16 14:04:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:04:02,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-16 14:04:02,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2813, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 14:04:02,684 INFO L87 Difference]: Start difference. First operand 257 states and 448 transitions. Second operand has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 52 states have internal predecessors, (143), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:04:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:13,038 INFO L93 Difference]: Finished difference Result 883 states and 1419 transitions. [2025-03-16 14:04:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2025-03-16 14:04:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 52 states have internal predecessors, (143), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 79 [2025-03-16 14:04:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:13,042 INFO L225 Difference]: With dead ends: 883 [2025-03-16 14:04:13,042 INFO L226 Difference]: Without dead ends: 644 [2025-03-16 14:04:13,049 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6719 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3542, Invalid=21898, Unknown=0, NotChecked=0, Total=25440 [2025-03-16 14:04:13,050 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 1752 mSDsluCounter, 3396 mSDsCounter, 0 mSdLazyCounter, 5782 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 3495 SdHoareTripleChecker+Invalid, 6298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 5782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:13,050 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1761 Valid, 3495 Invalid, 6298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 5782 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2025-03-16 14:04:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2025-03-16 14:04:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 242. [2025-03-16 14:04:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 217 states have (on average 1.3824884792626728) internal successors, (300), 218 states have internal predecessors, (300), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-16 14:04:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 401 transitions. [2025-03-16 14:04:13,083 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 401 transitions. Word has length 79 [2025-03-16 14:04:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:13,083 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 401 transitions. [2025-03-16 14:04:13,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 52 states have internal predecessors, (143), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 14:04:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 401 transitions. [2025-03-16 14:04:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-03-16 14:04:13,086 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:13,086 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:13,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:13,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:13,286 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:13,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:13,287 INFO L85 PathProgramCache]: Analyzing trace with hash 101022279, now seen corresponding path program 1 times [2025-03-16 14:04:13,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:04:13,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122068852] [2025-03-16 14:04:13,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:13,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:04:13,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-03-16 14:04:13,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-03-16 14:04:13,318 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:13,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 4 proven. 126 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:04:13,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:04:13,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122068852] [2025-03-16 14:04:13,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122068852] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:13,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329919839] [2025-03-16 14:04:13,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:13,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:13,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:13,605 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:13,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 14:04:13,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-03-16 14:04:13,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-03-16 14:04:13,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:13,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:13,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-16 14:04:13,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 124 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:14,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 117 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:04:16,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329919839] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:16,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:04:16,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29, 30] total 71 [2025-03-16 14:04:16,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767077109] [2025-03-16 14:04:16,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:16,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-16 14:04:16,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:04:16,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-16 14:04:16,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=4611, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 14:04:16,652 INFO L87 Difference]: Start difference. First operand 242 states and 401 transitions. Second operand has 71 states, 71 states have (on average 2.7183098591549295) internal successors, (193), 67 states have internal predecessors, (193), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-16 14:04:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:41,210 INFO L93 Difference]: Finished difference Result 911 states and 1497 transitions. [2025-03-16 14:04:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2025-03-16 14:04:41,210 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.7183098591549295) internal successors, (193), 67 states have internal predecessors, (193), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 89 [2025-03-16 14:04:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:41,213 INFO L225 Difference]: With dead ends: 911 [2025-03-16 14:04:41,213 INFO L226 Difference]: Without dead ends: 693 [2025-03-16 14:04:41,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9273 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=4504, Invalid=32938, Unknown=0, NotChecked=0, Total=37442 [2025-03-16 14:04:41,217 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 2509 mSDsluCounter, 3564 mSDsCounter, 0 mSdLazyCounter, 9226 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2538 SdHoareTripleChecker+Valid, 3659 SdHoareTripleChecker+Invalid, 10056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 9226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:41,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2538 Valid, 3659 Invalid, 10056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 9226 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2025-03-16 14:04:41,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2025-03-16 14:04:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 276. [2025-03-16 14:04:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 246 states have (on average 1.3739837398373984) internal successors, (338), 247 states have internal predecessors, (338), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (139), 25 states have call predecessors, (139), 17 states have call successors, (139) [2025-03-16 14:04:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 495 transitions. [2025-03-16 14:04:41,243 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 495 transitions. Word has length 89 [2025-03-16 14:04:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:41,244 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 495 transitions. [2025-03-16 14:04:41,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.7183098591549295) internal successors, (193), 67 states have internal predecessors, (193), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-16 14:04:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 495 transitions. [2025-03-16 14:04:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-16 14:04:41,245 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:41,245 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:41,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:41,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:41,455 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:41,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1014125414, now seen corresponding path program 3 times [2025-03-16 14:04:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:04:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285338421] [2025-03-16 14:04:41,455 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:04:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:04:41,461 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 90 statements into 26 equivalence classes. [2025-03-16 14:04:41,492 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) and asserted 90 of 90 statements. [2025-03-16 14:04:41,492 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2025-03-16 14:04:41,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 4 proven. 493 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:41,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:04:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285338421] [2025-03-16 14:04:41,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285338421] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568697631] [2025-03-16 14:04:41,890 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:04:41,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:41,892 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:41,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 14:04:41,929 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 90 statements into 26 equivalence classes. [2025-03-16 14:04:41,975 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) and asserted 90 of 90 statements. [2025-03-16 14:04:41,976 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2025-03-16 14:04:41,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:41,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 14:04:41,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 25 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:04:42,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 4 proven. 493 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:42,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568697631] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:42,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:04:42,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2025-03-16 14:04:42,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381729591] [2025-03-16 14:04:42,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:42,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-03-16 14:04:42,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:04:42,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-03-16 14:04:42,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2025-03-16 14:04:42,984 INFO L87 Difference]: Start difference. First operand 276 states and 495 transitions. Second operand has 74 states, 74 states have (on average 2.4594594594594597) internal successors, (182), 74 states have internal predecessors, (182), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:04:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:43,387 INFO L93 Difference]: Finished difference Result 876 states and 1369 transitions. [2025-03-16 14:04:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-16 14:04:43,387 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.4594594594594597) internal successors, (182), 74 states have internal predecessors, (182), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 90 [2025-03-16 14:04:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:43,390 INFO L225 Difference]: With dead ends: 876 [2025-03-16 14:04:43,390 INFO L226 Difference]: Without dead ends: 641 [2025-03-16 14:04:43,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1917, Invalid=3633, Unknown=0, NotChecked=0, Total=5550 [2025-03-16 14:04:43,391 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 1408 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:43,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1408 Valid, 891 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2025-03-16 14:04:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 321. [2025-03-16 14:04:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 291 states have (on average 1.470790378006873) internal successors, (428), 292 states have internal predecessors, (428), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (139), 25 states have call predecessors, (139), 17 states have call successors, (139) [2025-03-16 14:04:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 585 transitions. [2025-03-16 14:04:43,419 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 585 transitions. Word has length 90 [2025-03-16 14:04:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:43,419 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 585 transitions. [2025-03-16 14:04:43,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.4594594594594597) internal successors, (182), 74 states have internal predecessors, (182), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 14:04:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 585 transitions. [2025-03-16 14:04:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-16 14:04:43,421 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:43,421 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:43,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-16 14:04:43,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-03-16 14:04:43,623 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:43,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 485088233, now seen corresponding path program 1 times [2025-03-16 14:04:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:04:43,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343684712] [2025-03-16 14:04:43,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:04:43,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 91 statements into 1 equivalence classes. [2025-03-16 14:04:43,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 91 of 91 statements. [2025-03-16 14:04:43,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:43,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 4 proven. 148 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:04:43,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:04:43,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343684712] [2025-03-16 14:04:43,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343684712] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:43,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238791926] [2025-03-16 14:04:43,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:43,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:43,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:43,930 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:43,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 14:04:43,966 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 91 statements into 1 equivalence classes. [2025-03-16 14:04:44,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 91 of 91 statements. [2025-03-16 14:04:44,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:44,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:44,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 14:04:44,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2025-03-16 14:04:44,140 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:44,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238791926] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:44,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:44,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 23 [2025-03-16 14:04:44,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359214809] [2025-03-16 14:04:44,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:44,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:44,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:04:44,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:44,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2025-03-16 14:04:44,141 INFO L87 Difference]: Start difference. First operand 321 states and 585 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:04:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:44,217 INFO L93 Difference]: Finished difference Result 383 states and 660 transitions. [2025-03-16 14:04:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 91 [2025-03-16 14:04:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:44,219 INFO L225 Difference]: With dead ends: 383 [2025-03-16 14:04:44,219 INFO L226 Difference]: Without dead ends: 339 [2025-03-16 14:04:44,219 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2025-03-16 14:04:44,219 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 8 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:44,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 541 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2025-03-16 14:04:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 325. [2025-03-16 14:04:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 295 states have (on average 1.4677966101694915) internal successors, (433), 295 states have internal predecessors, (433), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (139), 26 states have call predecessors, (139), 17 states have call successors, (139) [2025-03-16 14:04:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 590 transitions. [2025-03-16 14:04:44,249 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 590 transitions. Word has length 91 [2025-03-16 14:04:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:44,249 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 590 transitions. [2025-03-16 14:04:44,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:04:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 590 transitions. [2025-03-16 14:04:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-16 14:04:44,251 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:44,251 INFO L218 NwaCegarLoop]: trace histogram [13, 11, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:44,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-16 14:04:44,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-16 14:04:44,452 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:44,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1748897586, now seen corresponding path program 1 times [2025-03-16 14:04:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:04:44,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050545785] [2025-03-16 14:04:44,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:04:44,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-16 14:04:44,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-16 14:04:44,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:44,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 172 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:44,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:04:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050545785] [2025-03-16 14:04:44,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050545785] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943317127] [2025-03-16 14:04:44,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:44,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:44,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:44,729 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:44,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-16 14:04:44,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-16 14:04:44,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-16 14:04:44,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:44,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:44,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:04:44,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2025-03-16 14:04:44,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2025-03-16 14:04:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943317127] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:45,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:04:45,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 11] total 34 [2025-03-16 14:04:45,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545141089] [2025-03-16 14:04:45,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:45,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-16 14:04:45,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:04:45,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-16 14:04:45,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 14:04:45,170 INFO L87 Difference]: Start difference. First operand 325 states and 590 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 32 states have internal predecessors, (108), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 14:04:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:47,046 INFO L93 Difference]: Finished difference Result 684 states and 1235 transitions. [2025-03-16 14:04:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-03-16 14:04:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 32 states have internal predecessors, (108), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 92 [2025-03-16 14:04:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:47,051 INFO L225 Difference]: With dead ends: 684 [2025-03-16 14:04:47,051 INFO L226 Difference]: Without dead ends: 398 [2025-03-16 14:04:47,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=614, Invalid=6028, Unknown=0, NotChecked=0, Total=6642 [2025-03-16 14:04:47,053 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 257 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:47,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1660 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2070 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 14:04:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2025-03-16 14:04:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 307. [2025-03-16 14:04:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 278 states have (on average 1.485611510791367) internal successors, (413), 280 states have internal predecessors, (413), 17 states have call successors, (17), 3 states have call predecessors, (17), 11 states have return successors, (129), 23 states have call predecessors, (129), 16 states have call successors, (129) [2025-03-16 14:04:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 559 transitions. [2025-03-16 14:04:47,086 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 559 transitions. Word has length 92 [2025-03-16 14:04:47,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:47,086 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 559 transitions. [2025-03-16 14:04:47,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 32 states have internal predecessors, (108), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-16 14:04:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 559 transitions. [2025-03-16 14:04:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-03-16 14:04:47,087 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:47,088 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:47,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-16 14:04:47,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-16 14:04:47,289 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:47,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1503660880, now seen corresponding path program 1 times [2025-03-16 14:04:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:04:47,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097319199] [2025-03-16 14:04:47,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:04:47,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 94 statements into 1 equivalence classes. [2025-03-16 14:04:47,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 94 of 94 statements. [2025-03-16 14:04:47,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:47,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 172 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:04:47,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:04:47,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097319199] [2025-03-16 14:04:47,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097319199] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:47,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816360791] [2025-03-16 14:04:47,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:47,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:47,646 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:47,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-16 14:04:47,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 94 statements into 1 equivalence classes. [2025-03-16 14:04:47,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 94 of 94 statements. [2025-03-16 14:04:47,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:47,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:47,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 14:04:47,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-03-16 14:04:47,966 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:47,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816360791] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:47,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:47,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 24 [2025-03-16 14:04:47,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049145473] [2025-03-16 14:04:47,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:47,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:04:47,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:04:47,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:04:47,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2025-03-16 14:04:47,967 INFO L87 Difference]: Start difference. First operand 307 states and 559 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:04:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:48,051 INFO L93 Difference]: Finished difference Result 381 states and 649 transitions. [2025-03-16 14:04:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:04:48,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 94 [2025-03-16 14:04:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:48,053 INFO L225 Difference]: With dead ends: 381 [2025-03-16 14:04:48,053 INFO L226 Difference]: Without dead ends: 367 [2025-03-16 14:04:48,054 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2025-03-16 14:04:48,054 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 32 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:48,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 615 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2025-03-16 14:04:48,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 309. [2025-03-16 14:04:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 280 states have (on average 1.4857142857142858) internal successors, (416), 282 states have internal predecessors, (416), 17 states have call successors, (17), 3 states have call predecessors, (17), 11 states have return successors, (129), 23 states have call predecessors, (129), 16 states have call successors, (129) [2025-03-16 14:04:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 562 transitions. [2025-03-16 14:04:48,088 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 562 transitions. Word has length 94 [2025-03-16 14:04:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:48,088 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 562 transitions. [2025-03-16 14:04:48,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 14:04:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 562 transitions. [2025-03-16 14:04:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-16 14:04:48,091 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:48,091 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:48,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:48,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:48,293 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:48,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1487191967, now seen corresponding path program 4 times [2025-03-16 14:04:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:04:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777554450] [2025-03-16 14:04:48,294 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 14:04:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:04:48,299 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 95 statements into 2 equivalence classes. [2025-03-16 14:04:48,317 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-16 14:04:48,317 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 14:04:48,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 4 proven. 471 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:48,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:04:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777554450] [2025-03-16 14:04:48,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777554450] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972358699] [2025-03-16 14:04:48,908 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 14:04:48,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:48,909 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:48,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-16 14:04:48,946 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 95 statements into 2 equivalence classes. [2025-03-16 14:04:48,968 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-16 14:04:48,968 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 14:04:48,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:48,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-03-16 14:04:48,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 10 proven. 471 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:49,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 10 proven. 471 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972358699] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:51,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:04:51,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 34, 35] total 93 [2025-03-16 14:04:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859518895] [2025-03-16 14:04:51,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:51,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2025-03-16 14:04:51,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:04:51,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2025-03-16 14:04:51,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=7828, Unknown=0, NotChecked=0, Total=8556 [2025-03-16 14:04:51,984 INFO L87 Difference]: Start difference. First operand 309 states and 562 transitions. Second operand has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 89 states have internal predecessors, (210), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10)