./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-2.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/recursive-simple/id_i15_o15-2.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 109f1b0f7b496206cc9c53b0a3b6a7c393044a874053b245259453c5fb39b930 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:54:12,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:54:12,870 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:54:12,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:54:12,873 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:54:12,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:54:12,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:54:12,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:54:12,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:54:12,892 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:54:12,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:54:12,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:54:12,892 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:54:12,892 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:54:12,892 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:54:12,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:54:12,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:54:12,892 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:54:12,894 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:54:12,894 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:54:12,894 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:54:12,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:54:12,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:54:12,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:54:12,894 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:54:12,895 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:54:12,895 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:54:12,895 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:54:12,895 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:54:12,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:54:12,895 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:54:12,895 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:54:12,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:54:12,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:54:12,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:54:12,896 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 -> 109f1b0f7b496206cc9c53b0a3b6a7c393044a874053b245259453c5fb39b930 [2025-03-16 18:54:13,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:54:13,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:54:13,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:54:13,115 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:54:13,115 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:54:13,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2025-03-16 18:54:14,197 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc338330e/ba3ddcf63c6e4c25b832ee0750527e3b/FLAG7ae59cec2 [2025-03-16 18:54:14,419 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:54:14,423 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2025-03-16 18:54:14,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc338330e/ba3ddcf63c6e4c25b832ee0750527e3b/FLAG7ae59cec2 [2025-03-16 18:54:14,447 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc338330e/ba3ddcf63c6e4c25b832ee0750527e3b [2025-03-16 18:54:14,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:54:14,452 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:54:14,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:54:14,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:54:14,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:54:14,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd6818d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14, skipping insertion in model container [2025-03-16 18:54:14,458 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,468 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:54:14,569 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/recursive-simple/id_i15_o15-2.c[454,467] [2025-03-16 18:54:14,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:54:14,577 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:54:14,586 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/recursive-simple/id_i15_o15-2.c[454,467] [2025-03-16 18:54:14,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:54:14,598 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:54:14,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14 WrapperNode [2025-03-16 18:54:14,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:54:14,600 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:54:14,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:54:14,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:54:14,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,610 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,619 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2025-03-16 18:54:14,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:54:14,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:54:14,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:54:14,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:54:14,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,626 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,634 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 18:54:14,634 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,639 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,639 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:54:14,641 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:54:14,642 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:54:14,642 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:54:14,642 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (1/1) ... [2025-03-16 18:54:14,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:54:14,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:14,667 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 18:54:14,669 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 18:54:14,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:54:14,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:54:14,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:54:14,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:54:14,685 INFO L130 BoogieDeclarations]: Found specification of procedure id [2025-03-16 18:54:14,685 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2025-03-16 18:54:14,721 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:54:14,722 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:54:14,782 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: havoc #t~ret4; [2025-03-16 18:54:14,786 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-03-16 18:54:14,786 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:54:14,792 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:54:14,792 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:54:14,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:54:14 BoogieIcfgContainer [2025-03-16 18:54:14,793 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:54:14,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:54:14,794 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:54:14,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:54:14,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:54:14" (1/3) ... [2025-03-16 18:54:14,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bca3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:54:14, skipping insertion in model container [2025-03-16 18:54:14,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:54:14" (2/3) ... [2025-03-16 18:54:14,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bca3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:54:14, skipping insertion in model container [2025-03-16 18:54:14,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:54:14" (3/3) ... [2025-03-16 18:54:14,799 INFO L128 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2025-03-16 18:54:14,809 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:54:14,811 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG id_i15_o15-2.c that has 2 procedures, 15 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-16 18:54:14,840 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:54:14,850 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;@2b1822a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:54:14,851 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:54:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:54:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 18:54:14,859 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:14,859 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:14,859 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:14,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:14,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2049432346, now seen corresponding path program 1 times [2025-03-16 18:54:14,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:14,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078533349] [2025-03-16 18:54:14,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:54:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:14,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 18:54:14,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 18:54:14,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:54:14,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:54:15,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:15,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078533349] [2025-03-16 18:54:15,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078533349] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:54:15,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:54:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:54:15,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904701019] [2025-03-16 18:54:15,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:54:15,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:54:15,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:15,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:54:15,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:54:15,066 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:54:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:15,097 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2025-03-16 18:54:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:54:15,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2025-03-16 18:54:15,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:15,102 INFO L225 Difference]: With dead ends: 24 [2025-03-16 18:54:15,102 INFO L226 Difference]: Without dead ends: 14 [2025-03-16 18:54:15,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 18:54:15,106 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:15,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:54:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-16 18:54:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-16 18:54:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:54:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2025-03-16 18:54:15,127 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2025-03-16 18:54:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:15,127 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2025-03-16 18:54:15,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:54:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2025-03-16 18:54:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 18:54:15,129 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:15,129 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:15,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:54:15,129 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:15,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1071660829, now seen corresponding path program 1 times [2025-03-16 18:54:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:15,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831485256] [2025-03-16 18:54:15,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:54:15,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:15,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 18:54:15,144 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 18:54:15,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:54:15,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:54:15,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:15,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831485256] [2025-03-16 18:54:15,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831485256] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:15,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362754495] [2025-03-16 18:54:15,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:54:15,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:15,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:15,215 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 18:54:15,217 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 18:54:15,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 18:54:15,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 18:54:15,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:54:15,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:15,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 18:54:15,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:54:15,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 18:54:15,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362754495] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:15,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:15,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-03-16 18:54:15,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61499556] [2025-03-16 18:54:15,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:15,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:54:15,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:15,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:54:15,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:54:15,488 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 18:54:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:15,534 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2025-03-16 18:54:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:54:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 15 [2025-03-16 18:54:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:15,535 INFO L225 Difference]: With dead ends: 21 [2025-03-16 18:54:15,535 INFO L226 Difference]: Without dead ends: 17 [2025-03-16 18:54:15,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:54:15,536 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:15,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:54:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-16 18:54:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-03-16 18:54:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:54:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2025-03-16 18:54:15,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2025-03-16 18:54:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:15,540 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2025-03-16 18:54:15,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 18:54:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2025-03-16 18:54:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 18:54:15,541 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:15,541 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:15,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 18:54:15,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:15,742 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:15,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:15,742 INFO L85 PathProgramCache]: Analyzing trace with hash 694941498, now seen corresponding path program 2 times [2025-03-16 18:54:15,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:15,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765151532] [2025-03-16 18:54:15,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:54:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:15,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-16 18:54:15,753 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 18:54:15,753 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:54:15,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 18:54:15,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765151532] [2025-03-16 18:54:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765151532] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865399726] [2025-03-16 18:54:15,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:54:15,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:15,866 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 18:54:15,868 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 18:54:15,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-16 18:54:15,897 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 18:54:15,897 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:54:15,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:15,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 18:54:15,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 18:54:15,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 18:54:16,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865399726] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:16,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:16,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2025-03-16 18:54:16,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243252931] [2025-03-16 18:54:16,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:16,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 18:54:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:16,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 18:54:16,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:54:16,182 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-16 18:54:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:16,235 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2025-03-16 18:54:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:54:16,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 21 [2025-03-16 18:54:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:16,237 INFO L225 Difference]: With dead ends: 24 [2025-03-16 18:54:16,237 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 18:54:16,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-03-16 18:54:16,238 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:16,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:54:16,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 18:54:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-16 18:54:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:54:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2025-03-16 18:54:16,241 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2025-03-16 18:54:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:16,241 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2025-03-16 18:54:16,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-16 18:54:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2025-03-16 18:54:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 18:54:16,242 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:16,242 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:16,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 18:54:16,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-16 18:54:16,442 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:16,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1868965309, now seen corresponding path program 3 times [2025-03-16 18:54:16,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:16,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801929877] [2025-03-16 18:54:16,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:54:16,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:16,447 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-16 18:54:16,461 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 18:54:16,461 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:54:16,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 18:54:16,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801929877] [2025-03-16 18:54:16,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801929877] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747709288] [2025-03-16 18:54:16,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:54:16,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:16,594 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 18:54:16,604 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 18:54:16,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 4 equivalence classes. [2025-03-16 18:54:16,632 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 18:54:16,633 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:54:16,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:16,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 18:54:16,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 18:54:16,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 18:54:17,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747709288] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:17,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:17,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2025-03-16 18:54:17,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272643336] [2025-03-16 18:54:17,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:17,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 18:54:17,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:17,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 18:54:17,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-16 18:54:17,062 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-16 18:54:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:17,142 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2025-03-16 18:54:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 18:54:17,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 27 [2025-03-16 18:54:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:17,144 INFO L225 Difference]: With dead ends: 27 [2025-03-16 18:54:17,145 INFO L226 Difference]: Without dead ends: 23 [2025-03-16 18:54:17,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2025-03-16 18:54:17,146 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:17,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 49 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:54:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-16 18:54:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-16 18:54:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:54:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2025-03-16 18:54:17,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2025-03-16 18:54:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:17,149 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2025-03-16 18:54:17,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-16 18:54:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2025-03-16 18:54:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 18:54:17,150 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:17,150 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:17,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 18:54:17,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:17,355 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:17,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1787489114, now seen corresponding path program 4 times [2025-03-16 18:54:17,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:17,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608195178] [2025-03-16 18:54:17,357 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:54:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:17,360 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-16 18:54:17,365 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:54:17,365 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:54:17,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-16 18:54:17,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:17,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608195178] [2025-03-16 18:54:17,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608195178] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:17,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736424629] [2025-03-16 18:54:17,490 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:54:17,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:17,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:17,491 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 18:54:17,492 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 18:54:17,521 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-16 18:54:17,531 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 18:54:17,532 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:54:17,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:17,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 18:54:17,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-16 18:54:17,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 18:54:18,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736424629] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:18,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:18,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 13] total 20 [2025-03-16 18:54:18,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946587403] [2025-03-16 18:54:18,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:18,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 18:54:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:18,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 18:54:18,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2025-03-16 18:54:18,165 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-16 18:54:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:18,267 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2025-03-16 18:54:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 18:54:18,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 33 [2025-03-16 18:54:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:18,269 INFO L225 Difference]: With dead ends: 42 [2025-03-16 18:54:18,269 INFO L226 Difference]: Without dead ends: 38 [2025-03-16 18:54:18,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2025-03-16 18:54:18,271 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:18,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 65 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:54:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-16 18:54:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2025-03-16 18:54:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 18:54:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2025-03-16 18:54:18,278 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2025-03-16 18:54:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:18,278 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2025-03-16 18:54:18,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-16 18:54:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2025-03-16 18:54:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 18:54:18,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:18,281 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:18,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 18:54:18,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:18,482 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:18,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 507757827, now seen corresponding path program 5 times [2025-03-16 18:54:18,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:18,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309220241] [2025-03-16 18:54:18,483 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:54:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:18,487 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 8 equivalence classes. [2025-03-16 18:54:18,500 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 18:54:18,500 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 18:54:18,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 18:54:18,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:18,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309220241] [2025-03-16 18:54:18,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309220241] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:18,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113949748] [2025-03-16 18:54:18,705 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:54:18,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:18,708 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 18:54:18,710 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 18:54:18,739 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 8 equivalence classes. [2025-03-16 18:54:18,754 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 18:54:18,754 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 18:54:18,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:18,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 18:54:18,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 18:54:18,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 18:54:20,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113949748] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:20,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:20,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 19] total 38 [2025-03-16 18:54:20,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129586813] [2025-03-16 18:54:20,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:20,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 18:54:20,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:20,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 18:54:20,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 18:54:20,645 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 38 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (24), 16 states have call predecessors, (24), 11 states have call successors, (24) [2025-03-16 18:54:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:20,883 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2025-03-16 18:54:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-16 18:54:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (24), 16 states have call predecessors, (24), 11 states have call successors, (24) Word has length 51 [2025-03-16 18:54:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:20,885 INFO L225 Difference]: With dead ends: 48 [2025-03-16 18:54:20,885 INFO L226 Difference]: Without dead ends: 41 [2025-03-16 18:54:20,886 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=529, Invalid=2227, Unknown=0, NotChecked=0, Total=2756 [2025-03-16 18:54:20,886 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:20,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 126 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:54:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-16 18:54:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2025-03-16 18:54:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-16 18:54:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2025-03-16 18:54:20,896 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 51 [2025-03-16 18:54:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:20,897 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2025-03-16 18:54:20,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (24), 16 states have call predecessors, (24), 11 states have call successors, (24) [2025-03-16 18:54:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2025-03-16 18:54:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-16 18:54:20,898 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:20,898 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:20,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 18:54:21,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:21,099 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:21,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:21,100 INFO L85 PathProgramCache]: Analyzing trace with hash -617522278, now seen corresponding path program 6 times [2025-03-16 18:54:21,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:21,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725046846] [2025-03-16 18:54:21,100 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:54:21,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:21,107 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 9 equivalence classes. [2025-03-16 18:54:21,120 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 57 of 57 statements. [2025-03-16 18:54:21,121 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-16 18:54:21,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-16 18:54:21,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:21,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725046846] [2025-03-16 18:54:21,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725046846] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:21,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485898394] [2025-03-16 18:54:21,371 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:54:21,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:21,373 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 18:54:21,381 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 18:54:21,427 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 9 equivalence classes. [2025-03-16 18:54:21,442 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 57 of 57 statements. [2025-03-16 18:54:21,442 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-16 18:54:21,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:21,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 18:54:21,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-16 18:54:21,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 18:54:23,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485898394] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:23,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:23,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 21] total 42 [2025-03-16 18:54:23,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883864424] [2025-03-16 18:54:23,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:23,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-16 18:54:23,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:23,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-16 18:54:23,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 18:54:23,668 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 42 states, 40 states have (on average 1.65) internal successors, (66), 33 states have internal predecessors, (66), 12 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (27), 18 states have call predecessors, (27), 12 states have call successors, (27) [2025-03-16 18:54:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:23,973 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2025-03-16 18:54:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 18:54:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.65) internal successors, (66), 33 states have internal predecessors, (66), 12 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (27), 18 states have call predecessors, (27), 12 states have call successors, (27) Word has length 57 [2025-03-16 18:54:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:23,974 INFO L225 Difference]: With dead ends: 51 [2025-03-16 18:54:23,974 INFO L226 Difference]: Without dead ends: 44 [2025-03-16 18:54:23,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=657, Invalid=2765, Unknown=0, NotChecked=0, Total=3422 [2025-03-16 18:54:23,976 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 114 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:23,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 144 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:54:23,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-16 18:54:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2025-03-16 18:54:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-16 18:54:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2025-03-16 18:54:23,980 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 57 [2025-03-16 18:54:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:23,981 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2025-03-16 18:54:23,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.65) internal successors, (66), 33 states have internal predecessors, (66), 12 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (27), 18 states have call predecessors, (27), 12 states have call successors, (27) [2025-03-16 18:54:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2025-03-16 18:54:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-16 18:54:23,982 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:23,982 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:23,988 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 18:54:24,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:24,186 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:24,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1351063139, now seen corresponding path program 7 times [2025-03-16 18:54:24,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:24,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467529214] [2025-03-16 18:54:24,187 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:54:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:24,190 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-16 18:54:24,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 18:54:24,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:54:24,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-03-16 18:54:24,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467529214] [2025-03-16 18:54:24,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467529214] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446381363] [2025-03-16 18:54:24,362 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:54:24,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:24,364 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 18:54:24,366 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 18:54:24,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-16 18:54:24,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 18:54:24,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:54:24,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:24,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-16 18:54:24,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-03-16 18:54:24,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-16 18:54:26,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446381363] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:26,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:26,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2025-03-16 18:54:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918770718] [2025-03-16 18:54:26,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:26,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 18:54:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:26,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 18:54:26,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-03-16 18:54:26,997 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2025-03-16 18:54:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:27,099 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2025-03-16 18:54:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 18:54:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) Word has length 63 [2025-03-16 18:54:27,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:27,100 INFO L225 Difference]: With dead ends: 54 [2025-03-16 18:54:27,100 INFO L226 Difference]: Without dead ends: 47 [2025-03-16 18:54:27,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 18:54:27,100 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:27,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 97 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:54:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-16 18:54:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2025-03-16 18:54:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-16 18:54:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2025-03-16 18:54:27,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 63 [2025-03-16 18:54:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:27,106 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2025-03-16 18:54:27,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2025-03-16 18:54:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2025-03-16 18:54:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 18:54:27,107 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:27,107 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:27,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 18:54:27,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:27,307 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:27,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1612392518, now seen corresponding path program 8 times [2025-03-16 18:54:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120367956] [2025-03-16 18:54:27,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:54:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:27,312 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-03-16 18:54:27,318 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 18:54:27,318 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:54:27,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-03-16 18:54:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120367956] [2025-03-16 18:54:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120367956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852166761] [2025-03-16 18:54:27,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:54:27,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:27,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:27,501 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 18:54:27,503 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 18:54:27,611 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-03-16 18:54:27,627 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 18:54:27,627 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:54:27,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:27,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 18:54:27,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-16 18:54:27,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 18:54:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852166761] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:31,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:31,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 29 [2025-03-16 18:54:31,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915205750] [2025-03-16 18:54:31,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:31,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 18:54:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:31,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 18:54:31,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2025-03-16 18:54:31,087 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-16 18:54:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:31,290 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2025-03-16 18:54:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:54:31,291 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) Word has length 69 [2025-03-16 18:54:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:31,292 INFO L225 Difference]: With dead ends: 57 [2025-03-16 18:54:31,292 INFO L226 Difference]: Without dead ends: 50 [2025-03-16 18:54:31,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 123 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 18:54:31,293 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:31,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 84 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:54:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-16 18:54:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2025-03-16 18:54:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2025-03-16 18:54:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2025-03-16 18:54:31,298 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 69 [2025-03-16 18:54:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:31,298 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2025-03-16 18:54:31,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 28 states have internal predecessors, (54), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-16 18:54:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2025-03-16 18:54:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 18:54:31,299 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:31,299 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:31,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 18:54:31,503 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,SelfDestructingSolverStorable8 [2025-03-16 18:54:31,503 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:31,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1119006781, now seen corresponding path program 9 times [2025-03-16 18:54:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:31,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368474337] [2025-03-16 18:54:31,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:54:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:31,508 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 12 equivalence classes. [2025-03-16 18:54:31,516 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:54:31,516 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-16 18:54:31,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 224 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2025-03-16 18:54:31,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:31,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368474337] [2025-03-16 18:54:31,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368474337] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:31,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937469537] [2025-03-16 18:54:31,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:54:31,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:31,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:31,766 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 18:54:31,767 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 18:54:31,926 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 12 equivalence classes. [2025-03-16 18:54:31,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:54:31,946 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-16 18:54:31,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:31,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 18:54:31,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-03-16 18:54:32,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-16 18:54:36,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937469537] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:36,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:36,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 27] total 34 [2025-03-16 18:54:36,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093223871] [2025-03-16 18:54:36,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:36,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-16 18:54:36,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:36,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-16 18:54:36,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 18:54:36,439 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) [2025-03-16 18:54:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:36,560 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2025-03-16 18:54:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 18:54:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) Word has length 75 [2025-03-16 18:54:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:36,561 INFO L225 Difference]: With dead ends: 60 [2025-03-16 18:54:36,561 INFO L226 Difference]: Without dead ends: 53 [2025-03-16 18:54:36,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1352, Unknown=0, NotChecked=0, Total=1980 [2025-03-16 18:54:36,562 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:36,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 101 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:54:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-16 18:54:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2025-03-16 18:54:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2025-03-16 18:54:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2025-03-16 18:54:36,566 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 75 [2025-03-16 18:54:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:36,566 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2025-03-16 18:54:36,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 13 states have call predecessors, (28), 16 states have call successors, (28) [2025-03-16 18:54:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2025-03-16 18:54:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-16 18:54:36,567 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:36,567 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:36,574 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 18:54:36,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 18:54:36,769 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:36,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash -523555878, now seen corresponding path program 10 times [2025-03-16 18:54:36,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:36,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449846860] [2025-03-16 18:54:36,771 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:54:36,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:36,779 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-03-16 18:54:36,787 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-03-16 18:54:36,787 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:54:36,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 21 proven. 245 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2025-03-16 18:54:36,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:54:36,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449846860] [2025-03-16 18:54:36,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449846860] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:54:36,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7732333] [2025-03-16 18:54:36,993 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:54:36,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:54:36,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:54:36,994 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 18:54:36,996 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 18:54:37,194 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-03-16 18:54:37,210 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-03-16 18:54:37,210 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:54:37,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:54:37,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 18:54:37,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:54:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-03-16 18:54:37,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:54:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-16 18:54:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7732333] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:54:42,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:54:42,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 29] total 36 [2025-03-16 18:54:42,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003076998] [2025-03-16 18:54:42,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:54:42,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-16 18:54:42,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:54:42,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-16 18:54:42,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 18:54:42,850 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2025-03-16 18:54:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:54:43,036 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2025-03-16 18:54:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 18:54:43,036 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) Word has length 81 [2025-03-16 18:54:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:54:43,037 INFO L225 Difference]: With dead ends: 72 [2025-03-16 18:54:43,037 INFO L226 Difference]: Without dead ends: 62 [2025-03-16 18:54:43,037 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2025-03-16 18:54:43,038 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:54:43,038 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 124 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:54:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-16 18:54:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2025-03-16 18:54:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2025-03-16 18:54:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2025-03-16 18:54:43,043 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 81 [2025-03-16 18:54:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:54:43,043 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2025-03-16 18:54:43,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2025-03-16 18:54:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2025-03-16 18:54:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-16 18:54:43,044 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:54:43,044 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:54:43,051 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 18:54:43,244 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,SelfDestructingSolverStorable10 [2025-03-16 18:54:43,244 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:54:43,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:54:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1241938563, now seen corresponding path program 11 times [2025-03-16 18:54:43,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:54:43,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015456924] [2025-03-16 18:54:43,245 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:54:43,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:54:43,252 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 16 equivalence classes. [2025-03-16 18:54:43,266 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 99 of 99 statements. [2025-03-16 18:54:43,267 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-16 18:54:43,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 18:54:43,267 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-16 18:54:43,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 99 statements into 1 equivalence classes. [2025-03-16 18:54:43,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 99 of 99 statements. [2025-03-16 18:54:43,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:54:43,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 18:54:43,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-16 18:54:43,296 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-16 18:54:43,297 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 18:54:43,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-16 18:54:43,300 INFO L422 BasicCegarLoop]: Path program histogram: [11, 1] [2025-03-16 18:54:43,322 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 18:54:43,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 06:54:43 BoogieIcfgContainer [2025-03-16 18:54:43,325 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 18:54:43,326 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 18:54:43,326 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 18:54:43,326 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 18:54:43,327 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:54:14" (3/4) ... [2025-03-16 18:54:43,327 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-03-16 18:54:43,359 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 50. [2025-03-16 18:54:43,415 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 18:54:43,416 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 18:54:43,416 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 18:54:43,416 INFO L158 Benchmark]: Toolchain (without parser) took 28964.50ms. Allocated memory was 142.6MB in the beginning and 377.5MB in the end (delta: 234.9MB). Free memory was 105.3MB in the beginning and 159.9MB in the end (delta: -54.6MB). Peak memory consumption was 176.6MB. Max. memory is 16.1GB. [2025-03-16 18:54:43,417 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory was 128.6MB in the beginning and 128.3MB in the end (delta: 307.7kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:54:43,417 INFO L158 Benchmark]: CACSL2BoogieTranslator took 146.66ms. Allocated memory is still 142.6MB. Free memory was 105.3MB in the beginning and 95.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:54:43,417 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.40ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 94.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:54:43,417 INFO L158 Benchmark]: Boogie Preprocessor took 20.19ms. Allocated memory is still 142.6MB. Free memory was 94.3MB in the beginning and 93.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:54:43,417 INFO L158 Benchmark]: IcfgBuilder took 151.35ms. Allocated memory is still 142.6MB. Free memory was 93.2MB in the beginning and 82.8MB in the end (delta: 10.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-16 18:54:43,418 INFO L158 Benchmark]: TraceAbstraction took 28531.16ms. Allocated memory was 142.6MB in the beginning and 377.5MB in the end (delta: 234.9MB). Free memory was 82.8MB in the beginning and 164.1MB in the end (delta: -81.3MB). Peak memory consumption was 151.5MB. Max. memory is 16.1GB. [2025-03-16 18:54:43,418 INFO L158 Benchmark]: Witness Printer took 90.12ms. Allocated memory is still 377.5MB. Free memory was 164.1MB in the beginning and 159.9MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:54:43,419 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory was 128.6MB in the beginning and 128.3MB in the end (delta: 307.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 146.66ms. Allocated memory is still 142.6MB. Free memory was 105.3MB in the beginning and 95.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.40ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 94.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.19ms. Allocated memory is still 142.6MB. Free memory was 94.3MB in the beginning and 93.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 151.35ms. Allocated memory is still 142.6MB. Free memory was 93.2MB in the beginning and 82.8MB in the end (delta: 10.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 28531.16ms. Allocated memory was 142.6MB in the beginning and 377.5MB in the end (delta: 234.9MB). Free memory was 82.8MB in the beginning and 164.1MB in the end (delta: -81.3MB). Peak memory consumption was 151.5MB. Max. memory is 16.1GB. * Witness Printer took 90.12ms. Allocated memory is still 377.5MB. Free memory was 164.1MB in the beginning and 159.9MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 15; VAL [input=15] [L13] CALL, EXPR id(input) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, x=15] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [input=15] [L13] int result = id(input); [L14] COND TRUE result == 15 VAL [input=15] [L15] reach_error() VAL [input=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 19 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.5s, OverallIterations: 12, TraceHistogramMax: 16, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 589 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 509 mSDsluCounter, 921 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 811 mSDsCounter, 232 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 763 IncrementalHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 232 mSolverCounterUnsat, 110 mSDtfsCounter, 763 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1246 GetRequests, 830 SyntacticMatches, 77 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=11, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 23.6s InterpolantComputationTime, 1092 NumberOfCodeBlocks, 1092 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 1454 ConstructedInterpolants, 0 QuantifiedInterpolants, 4294 SizeOfPredicates, 67 NumberOfNonLiveVariables, 1368 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 2076/5502 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-03-16 18:54:43,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE