./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.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/nla-digbench-scaling/fermat1-ll_unwindbound2.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 26bf02dce57f3cc9fa9e6af5bd48026588368cec482f21797d4110581d1b8f61 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:11:28,898 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:11:28,947 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:11:28,953 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:11:28,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:11:28,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:11:28,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:11:28,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:11:28,972 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:11:28,973 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:11:28,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:11:28,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:11:28,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:11:28,974 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:11:28,975 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:11:28,975 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:11:28,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:11:28,975 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 -> 26bf02dce57f3cc9fa9e6af5bd48026588368cec482f21797d4110581d1b8f61 [2025-03-16 18:11:29,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:11:29,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:11:29,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:11:29,182 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:11:29,182 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:11:29,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2025-03-16 18:11:30,288 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f95c9decf/636ea66e1a584efe9f06467b8f9b0ba4/FLAG40518c276 [2025-03-16 18:11:30,536 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:11:30,537 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2025-03-16 18:11:30,543 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f95c9decf/636ea66e1a584efe9f06467b8f9b0ba4/FLAG40518c276 [2025-03-16 18:11:30,560 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f95c9decf/636ea66e1a584efe9f06467b8f9b0ba4 [2025-03-16 18:11:30,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:11:30,563 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:11:30,565 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:11:30,565 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:11:30,568 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:11:30,568 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,571 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a78a477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30, skipping insertion in model container [2025-03-16 18:11:30,571 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,580 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:11:30,683 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c[535,548] [2025-03-16 18:11:30,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:11:30,708 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:11:30,717 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c[535,548] [2025-03-16 18:11:30,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:11:30,736 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:11:30,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30 WrapperNode [2025-03-16 18:11:30,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:11:30,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:11:30,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:11:30,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:11:30,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,748 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,760 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2025-03-16 18:11:30,761 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:11:30,761 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:11:30,762 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:11:30,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:11:30,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,769 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,783 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 18:11:30,784 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,784 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,786 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,794 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:11:30,796 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:11:30,796 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:11:30,796 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:11:30,797 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (1/1) ... [2025-03-16 18:11:30,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:11:30,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:30,822 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 18:11:30,824 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 18:11:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:11:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 18:11:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 18:11:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:11:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:11:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:11:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:11:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:11:30,880 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:11:30,882 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:11:30,999 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-16 18:11:30,999 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:11:31,007 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:11:31,008 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:11:31,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:11:31 BoogieIcfgContainer [2025-03-16 18:11:31,008 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:11:31,010 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:11:31,010 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:11:31,014 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:11:31,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:11:30" (1/3) ... [2025-03-16 18:11:31,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e046ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:11:31, skipping insertion in model container [2025-03-16 18:11:31,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:30" (2/3) ... [2025-03-16 18:11:31,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e046ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:11:31, skipping insertion in model container [2025-03-16 18:11:31,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:11:31" (3/3) ... [2025-03-16 18:11:31,016 INFO L128 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound2.c [2025-03-16 18:11:31,025 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:11:31,026 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fermat1-ll_unwindbound2.c that has 3 procedures, 30 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 18:11:31,061 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:11:31,067 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;@73e94df6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:11:31,067 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:11:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:11:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 18:11:31,073 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:31,073 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:31,074 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:31,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1692342037, now seen corresponding path program 1 times [2025-03-16 18:11:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:31,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274514766] [2025-03-16 18:11:31,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:31,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:31,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 18:11:31,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 18:11:31,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:31,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:31,178 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 18:11:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274514766] [2025-03-16 18:11:31,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274514766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425601771] [2025-03-16 18:11:31,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:31,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:31,181 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 18:11:31,182 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 18:11:31,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 18:11:31,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 18:11:31,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:31,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:31,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-16 18:11:31,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:11:31,246 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:11:31,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425601771] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:31,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:11:31,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-16 18:11:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683393139] [2025-03-16 18:11:31,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:31,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:11:31,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:31,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:11:31,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:11:31,265 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:11:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:31,279 INFO L93 Difference]: Finished difference Result 58 states and 91 transitions. [2025-03-16 18:11:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:11:31,280 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-03-16 18:11:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:31,283 INFO L225 Difference]: With dead ends: 58 [2025-03-16 18:11:31,284 INFO L226 Difference]: Without dead ends: 27 [2025-03-16 18:11:31,285 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:11:31,290 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:31,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-16 18:11:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-16 18:11:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-16 18:11:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2025-03-16 18:11:31,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2025-03-16 18:11:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:31,317 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2025-03-16 18:11:31,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:11:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2025-03-16 18:11:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 18:11:31,318 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:31,318 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:31,325 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 18:11:31,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-16 18:11:31,523 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:31,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:31,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2106869129, now seen corresponding path program 1 times [2025-03-16 18:11:31,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:31,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780071420] [2025-03-16 18:11:31,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:31,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:31,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 18:11:31,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 18:11:31,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:31,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467061458] [2025-03-16 18:11:31,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:31,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:31,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:31,559 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 18:11:31,560 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 18:11:31,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 18:11:31,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 18:11:31,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:31,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:31,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:11:31,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:31,761 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:11:31,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:31,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780071420] [2025-03-16 18:11:31,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:31,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467061458] [2025-03-16 18:11:31,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467061458] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:31,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:31,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:11:31,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46931764] [2025-03-16 18:11:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:31,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:11:31,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:31,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:11:31,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:31,763 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:33,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:11:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:33,543 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2025-03-16 18:11:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:11:33,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-16 18:11:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:33,544 INFO L225 Difference]: With dead ends: 46 [2025-03-16 18:11:33,544 INFO L226 Difference]: Without dead ends: 44 [2025-03-16 18:11:33,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:33,545 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:33,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 97 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-16 18:11:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-16 18:11:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2025-03-16 18:11:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 18:11:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2025-03-16 18:11:33,553 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 18 [2025-03-16 18:11:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:33,553 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2025-03-16 18:11:33,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2025-03-16 18:11:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 18:11:33,554 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:33,554 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:33,561 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 18:11:33,754 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,SelfDestructingSolverStorable1 [2025-03-16 18:11:33,755 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:33,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2106124354, now seen corresponding path program 1 times [2025-03-16 18:11:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:33,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218171873] [2025-03-16 18:11:33,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:33,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:33,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 18:11:33,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 18:11:33,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:33,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:33,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218171873] [2025-03-16 18:11:33,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218171873] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:33,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:33,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 18:11:33,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550153827] [2025-03-16 18:11:33,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:33,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:11:33,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:33,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:11:33,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:11:33,835 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:33,855 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2025-03-16 18:11:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:11:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-16 18:11:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:33,857 INFO L225 Difference]: With dead ends: 52 [2025-03-16 18:11:33,857 INFO L226 Difference]: Without dead ends: 45 [2025-03-16 18:11:33,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:11:33,858 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:33,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 89 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-16 18:11:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2025-03-16 18:11:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.40625) internal successors, (45), 33 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 18:11:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2025-03-16 18:11:33,869 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 18 [2025-03-16 18:11:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:33,869 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2025-03-16 18:11:33,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2025-03-16 18:11:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 18:11:33,869 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:33,870 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:33,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 18:11:33,870 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:33,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash 880991770, now seen corresponding path program 1 times [2025-03-16 18:11:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:33,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646907127] [2025-03-16 18:11:33,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:33,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:33,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 18:11:33,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 18:11:33,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:33,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:34,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:34,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646907127] [2025-03-16 18:11:34,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646907127] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:34,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283808396] [2025-03-16 18:11:34,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:34,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:34,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:34,119 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 18:11:34,120 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 18:11:34,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 18:11:34,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 18:11:34,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:34,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:34,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 18:11:34,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:34,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:34,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283808396] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:11:34,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:11:34,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2025-03-16 18:11:34,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26154915] [2025-03-16 18:11:34,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:34,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 18:11:34,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:34,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 18:11:34,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2025-03-16 18:11:34,297 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 18:11:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:34,387 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2025-03-16 18:11:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 18:11:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2025-03-16 18:11:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:34,388 INFO L225 Difference]: With dead ends: 52 [2025-03-16 18:11:34,388 INFO L226 Difference]: Without dead ends: 47 [2025-03-16 18:11:34,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:11:34,389 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:34,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 141 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:11:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-16 18:11:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2025-03-16 18:11:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-16 18:11:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2025-03-16 18:11:34,399 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24 [2025-03-16 18:11:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:34,399 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2025-03-16 18:11:34,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 18:11:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2025-03-16 18:11:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 18:11:34,401 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:34,401 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:34,407 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 18:11:34,605 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 18:11:34,605 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:34,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash 387630040, now seen corresponding path program 1 times [2025-03-16 18:11:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:34,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623053380] [2025-03-16 18:11:34,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:34,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:34,609 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-16 18:11:34,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 18:11:34,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:34,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:34,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:34,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623053380] [2025-03-16 18:11:34,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623053380] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:34,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:34,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:11:34,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225373001] [2025-03-16 18:11:34,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:34,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:11:34,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:34,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:11:34,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:34,668 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:11:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:34,691 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2025-03-16 18:11:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:11:34,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2025-03-16 18:11:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:34,697 INFO L225 Difference]: With dead ends: 60 [2025-03-16 18:11:34,697 INFO L226 Difference]: Without dead ends: 39 [2025-03-16 18:11:34,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:34,698 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:34,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 104 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-16 18:11:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-03-16 18:11:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:11:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2025-03-16 18:11:34,706 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 30 [2025-03-16 18:11:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:34,707 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2025-03-16 18:11:34,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:11:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2025-03-16 18:11:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 18:11:34,707 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:34,708 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:34,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 18:11:34,708 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:34,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:34,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1055148464, now seen corresponding path program 1 times [2025-03-16 18:11:34,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:34,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697307414] [2025-03-16 18:11:34,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:34,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:34,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 18:11:34,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 18:11:34,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:34,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:34,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307410935] [2025-03-16 18:11:34,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:34,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:34,722 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 18:11:34,723 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 18:11:34,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 18:11:34,761 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 18:11:34,761 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:34,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 18:11:34,762 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-16 18:11:34,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 18:11:34,772 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 18:11:34,772 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:34,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 18:11:34,789 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-16 18:11:34,789 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-16 18:11:34,790 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 18:11:34,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 18:11:34,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:34,997 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2025-03-16 18:11:35,019 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 18:11:35,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 06:11:35 BoogieIcfgContainer [2025-03-16 18:11:35,022 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 18:11:35,022 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 18:11:35,022 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 18:11:35,022 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 18:11:35,023 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:11:31" (3/4) ... [2025-03-16 18:11:35,023 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-03-16 18:11:35,051 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 25. [2025-03-16 18:11:35,094 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 18:11:35,095 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 18:11:35,095 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 18:11:35,095 INFO L158 Benchmark]: Toolchain (without parser) took 4532.38ms. Allocated memory is still 142.6MB. Free memory was 113.0MB in the beginning and 71.6MB in the end (delta: 41.4MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. [2025-03-16 18:11:35,095 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:11:35,095 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.95ms. Allocated memory is still 142.6MB. Free memory was 113.0MB in the beginning and 101.5MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:11:35,095 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.79ms. Allocated memory is still 142.6MB. Free memory was 101.5MB in the beginning and 100.5MB in the end (delta: 990.8kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:11:35,096 INFO L158 Benchmark]: Boogie Preprocessor took 33.73ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 99.1MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:11:35,096 INFO L158 Benchmark]: IcfgBuilder took 212.34ms. Allocated memory is still 142.6MB. Free memory was 99.1MB in the beginning and 87.3MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:11:35,096 INFO L158 Benchmark]: TraceAbstraction took 4011.98ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 78.0MB in the end (delta: 8.8MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2025-03-16 18:11:35,096 INFO L158 Benchmark]: Witness Printer took 72.24ms. Allocated memory is still 142.6MB. Free memory was 78.0MB in the beginning and 71.6MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:11:35,097 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.95ms. Allocated memory is still 142.6MB. Free memory was 113.0MB in the beginning and 101.5MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.79ms. Allocated memory is still 142.6MB. Free memory was 101.5MB in the beginning and 100.5MB in the end (delta: 990.8kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.73ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 99.1MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 212.34ms. Allocated memory is still 142.6MB. Free memory was 99.1MB in the beginning and 87.3MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4011.98ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 78.0MB in the end (delta: 8.8MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * Witness Printer took 72.24ms. Allocated memory is still 142.6MB. Free memory was 78.0MB in the beginning and 71.6MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=3, R=0, counter=0] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=3, R=0, counter=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=3, counter=0, r=-3, u=1, v=1] [L34] COND TRUE counter++<2 [L34] EXPR counter++ VAL [A=3, counter=1, r=-3, u=1, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=1, r=-3, u=1, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=3, counter=1, r=-3, u=1, v=1] [L39] COND TRUE counter++<2 [L39] EXPR counter++ VAL [A=3, counter=2, r=-3, u=1, v=1] [L39] COND TRUE counter++<2 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=2, r=-3, u=1, v=1] [L41] COND TRUE !(r > 0) VAL [A=3, counter=2, r=-3, u=1, v=1] [L47] COND TRUE counter++<2 [L47] EXPR counter++ VAL [A=3, counter=3, r=-3, u=1, v=1] [L47] COND FALSE !(counter++<2) [L34] COND TRUE counter++<2 [L34] EXPR counter++ VAL [A=3, counter=4, r=-3, u=1, v=1] [L34] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=4] [L12] COND TRUE !(cond) VAL [\old(cond)=0, counter=4] [L14] reach_error() VAL [\old(cond)=0, counter=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 50 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 470 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 315 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 150 IncrementalHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 155 mSDtfsCounter, 150 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=3, InterpolantAutomatonStates: 24, 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, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 503 SizeOfPredicates, 2 NumberOfNonLiveVariables, 202 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 37/42 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 18:11:35,107 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