./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/gcd_4.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 679f2fe8d678884423b2dff47bf2c3c7ede0374b3a8bb68f9a9e8a332d8776ef --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 14:02:09,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 14:02:09,710 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 14:02:09,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 14:02:09,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 14:02:09,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 14:02:09,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 14:02:09,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 14:02:09,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 14:02:09,736 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 14:02:09,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 14:02:09,737 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 14:02:09,737 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 14:02:09,738 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 14:02:09,738 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 14:02:09,738 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 14:02:09,738 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 14:02:09,738 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 14:02:09,738 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 14:02:09,738 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 14:02:09,738 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 14:02:09,739 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 14:02:09,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:02:09,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 14:02:09,740 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 14:02:09,741 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 -> 679f2fe8d678884423b2dff47bf2c3c7ede0374b3a8bb68f9a9e8a332d8776ef [2025-03-16 14:02:09,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 14:02:09,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 14:02:09,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 14:02:09,975 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 14:02:09,975 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 14:02:09,976 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_4.c [2025-03-16 14:02:11,122 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0571c8f/c4c85d6639fe4c0cbd6abc903adf5ba9/FLAG7d5c01ed7 [2025-03-16 14:02:11,375 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 14:02:11,375 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c [2025-03-16 14:02:11,392 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0571c8f/c4c85d6639fe4c0cbd6abc903adf5ba9/FLAG7d5c01ed7 [2025-03-16 14:02:11,706 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0571c8f/c4c85d6639fe4c0cbd6abc903adf5ba9 [2025-03-16 14:02:11,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 14:02:11,708 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 14:02:11,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 14:02:11,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 14:02:11,713 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 14:02:11,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39cbbcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11, skipping insertion in model container [2025-03-16 14:02:11,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,723 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 14:02:11,811 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c[662,675] [2025-03-16 14:02:11,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:02:11,830 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 14:02:11,838 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_4.c[662,675] [2025-03-16 14:02:11,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:02:11,857 INFO L204 MainTranslator]: Completed translation [2025-03-16 14:02:11,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11 WrapperNode [2025-03-16 14:02:11,858 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 14:02:11,859 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 14:02:11,859 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 14:02:11,859 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 14:02:11,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,867 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,880 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2025-03-16 14:02:11,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 14:02:11,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 14:02:11,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 14:02:11,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 14:02:11,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,891 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,898 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2025-03-16 14:02:11,900 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,900 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,902 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,906 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,907 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,907 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 14:02:11,911 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 14:02:11,911 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 14:02:11,911 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 14:02:11,912 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (1/1) ... [2025-03-16 14:02:11,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:02:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:02:11,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 14:02:11,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 14:02:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 14:02:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 14:02:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 14:02:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 14:02:11,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 14:02:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 14:02:11,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 14:02:11,999 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 14:02:12,001 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 14:02:12,117 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-03-16 14:02:12,117 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 14:02:12,123 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 14:02:12,123 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 14:02:12,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:02:12 BoogieIcfgContainer [2025-03-16 14:02:12,124 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 14:02:12,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 14:02:12,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 14:02:12,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 14:02:12,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:02:11" (1/3) ... [2025-03-16 14:02:12,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58292804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:02:12, skipping insertion in model container [2025-03-16 14:02:12,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:02:11" (2/3) ... [2025-03-16 14:02:12,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58292804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:02:12, skipping insertion in model container [2025-03-16 14:02:12,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:02:12" (3/3) ... [2025-03-16 14:02:12,130 INFO L128 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2025-03-16 14:02:12,141 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 14:02:12,142 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG gcd_4.c that has 2 procedures, 19 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-16 14:02:12,182 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 14:02:12,191 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;@7edb975a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 14:02:12,191 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 14:02:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 14:02:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 14:02:12,199 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:12,199 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:12,200 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:12,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash 228840703, now seen corresponding path program 1 times [2025-03-16 14:02:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:12,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079807411] [2025-03-16 14:02:12,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:02:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:12,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 14:02:12,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 14:02:12,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:02:12,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:12,404 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 14:02:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079807411] [2025-03-16 14:02:12,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079807411] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:02:12,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:02:12,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 14:02:12,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628615342] [2025-03-16 14:02:12,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:02:12,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:02:12,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:12,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:02:12,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:02:12,428 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:12,471 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2025-03-16 14:02:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:02:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 14:02:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:12,477 INFO L225 Difference]: With dead ends: 37 [2025-03-16 14:02:12,477 INFO L226 Difference]: Without dead ends: 18 [2025-03-16 14:02:12,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:02:12,484 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:02:12,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:02:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-16 14:02:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-16 14:02:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 14:02:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2025-03-16 14:02:12,512 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2025-03-16 14:02:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:12,512 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2025-03-16 14:02:12,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2025-03-16 14:02:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 14:02:12,513 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:12,514 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:12,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 14:02:12,514 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:12,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1116344384, now seen corresponding path program 1 times [2025-03-16 14:02:12,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:12,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220220719] [2025-03-16 14:02:12,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:02:12,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:12,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 14:02:12,530 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 14:02:12,530 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:02:12,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:12,610 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 14:02:12,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:12,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220220719] [2025-03-16 14:02:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220220719] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:02:12,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:02:12,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 14:02:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165344269] [2025-03-16 14:02:12,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:02:12,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:02:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:12,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:02:12,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:02:12,614 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:12,636 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2025-03-16 14:02:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:02:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 14:02:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:12,639 INFO L225 Difference]: With dead ends: 38 [2025-03-16 14:02:12,639 INFO L226 Difference]: Without dead ends: 22 [2025-03-16 14:02:12,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:02:12,640 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:02:12,640 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:02:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-16 14:02:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2025-03-16 14:02:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 14:02:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-16 14:02:12,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 9 [2025-03-16 14:02:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:12,647 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-16 14:02:12,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-16 14:02:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 14:02:12,648 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:12,648 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:12,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 14:02:12,648 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:12,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1735588084, now seen corresponding path program 1 times [2025-03-16 14:02:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:12,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660751901] [2025-03-16 14:02:12,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:02:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:12,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 14:02:12,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 14:02:12,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:02:12,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:12,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:12,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660751901] [2025-03-16 14:02:12,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660751901] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:02:12,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:02:12,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 14:02:12,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10351360] [2025-03-16 14:02:12,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:02:12,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:02:12,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:12,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:02:12,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:02:12,764 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:12,785 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-03-16 14:02:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:02:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-16 14:02:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:12,786 INFO L225 Difference]: With dead ends: 32 [2025-03-16 14:02:12,786 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 14:02:12,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:02:12,787 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 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 14:02:12,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:02:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 14:02:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-16 14:02:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 14:02:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-03-16 14:02:12,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2025-03-16 14:02:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:12,795 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-03-16 14:02:12,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-03-16 14:02:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 14:02:12,796 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:12,796 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:12,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 14:02:12,796 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:12,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1521939310, now seen corresponding path program 1 times [2025-03-16 14:02:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:12,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119421506] [2025-03-16 14:02:12,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:02:12,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:12,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 14:02:12,809 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 14:02:12,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:02:12,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:12,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:12,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119421506] [2025-03-16 14:02:12,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119421506] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:02:12,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638279730] [2025-03-16 14:02:12,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:02:12,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:02:12,916 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:02:12,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 14:02:12,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 14:02:12,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 14:02:12,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:02:12,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:12,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:02:12,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:02:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:13,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:02:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:13,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638279730] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:02:13,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:02:13,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2025-03-16 14:02:13,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684164867] [2025-03-16 14:02:13,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:02:13,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:02:13,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:13,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:02:13,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:02:13,116 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:13,160 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2025-03-16 14:02:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:02:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 14:02:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:13,162 INFO L225 Difference]: With dead ends: 36 [2025-03-16 14:02:13,162 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 14:02:13,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:02:13,163 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:02:13,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:02:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 14:02:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-16 14:02:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 14:02:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2025-03-16 14:02:13,171 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2025-03-16 14:02:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:13,171 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2025-03-16 14:02:13,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2025-03-16 14:02:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 14:02:13,172 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:13,172 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:13,180 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 14:02:13,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:13,376 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:13,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1026540878, now seen corresponding path program 2 times [2025-03-16 14:02:13,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:13,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337322071] [2025-03-16 14:02:13,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:02:13,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:13,382 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-16 14:02:13,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 14:02:13,394 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:02:13,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:13,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337322071] [2025-03-16 14:02:13,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337322071] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:02:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121396871] [2025-03-16 14:02:13,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:02:13,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:13,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:02:13,518 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:02:13,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 14:02:13,539 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-16 14:02:13,552 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 14:02:13,552 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 14:02:13,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:13,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:02:13,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:02:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:13,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:02:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:13,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121396871] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:02:13,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:02:13,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-16 14:02:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648797348] [2025-03-16 14:02:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:02:13,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 14:02:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:13,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 14:02:13,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:02:13,727 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:13,826 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2025-03-16 14:02:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:02:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-16 14:02:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:13,827 INFO L225 Difference]: With dead ends: 45 [2025-03-16 14:02:13,827 INFO L226 Difference]: Without dead ends: 31 [2025-03-16 14:02:13,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:02:13,828 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:02:13,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 103 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:02:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-16 14:02:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-16 14:02:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 14:02:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2025-03-16 14:02:13,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2025-03-16 14:02:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:13,833 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2025-03-16 14:02:13,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2025-03-16 14:02:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-16 14:02:13,833 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:13,833 INFO L218 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:13,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 14:02:14,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:14,037 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:14,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1823958675, now seen corresponding path program 3 times [2025-03-16 14:02:14,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:14,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489284184] [2025-03-16 14:02:14,038 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:02:14,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:14,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 6 equivalence classes. [2025-03-16 14:02:14,058 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 20 of 20 statements. [2025-03-16 14:02:14,058 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 14:02:14,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 14:02:14,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035030577] [2025-03-16 14:02:14,060 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 14:02:14,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:02:14,062 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:02:14,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 14:02:14,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 6 equivalence classes. [2025-03-16 14:02:14,099 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 16 of 20 statements. [2025-03-16 14:02:14,099 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 14:02:14,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:14,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 14:02:14,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:02:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:02:14,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:02:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:02:14,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:14,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489284184] [2025-03-16 14:02:14,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 14:02:14,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035030577] [2025-03-16 14:02:14,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035030577] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:02:14,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:02:14,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-03-16 14:02:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431265446] [2025-03-16 14:02:14,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:02:14,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:02:14,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:14,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:02:14,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:02:14,529 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:14,720 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2025-03-16 14:02:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 14:02:14,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-16 14:02:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:14,721 INFO L225 Difference]: With dead ends: 50 [2025-03-16 14:02:14,721 INFO L226 Difference]: Without dead ends: 47 [2025-03-16 14:02:14,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:02:14,722 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:02:14,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 83 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:02:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-16 14:02:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2025-03-16 14:02:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-16 14:02:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2025-03-16 14:02:14,730 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 20 [2025-03-16 14:02:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:14,730 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2025-03-16 14:02:14,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2025-03-16 14:02:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-16 14:02:14,730 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:14,731 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:14,737 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 14:02:14,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:14,932 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:14,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -964894260, now seen corresponding path program 4 times [2025-03-16 14:02:14,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:14,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571311131] [2025-03-16 14:02:14,932 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 14:02:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:14,937 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-16 14:02:14,953 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 14:02:14,954 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 14:02:14,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:15,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571311131] [2025-03-16 14:02:15,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571311131] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:02:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611520410] [2025-03-16 14:02:15,043 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 14:02:15,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:15,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:02:15,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:02:15,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 14:02:15,069 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-16 14:02:15,081 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 14:02:15,081 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 14:02:15,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:15,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 14:02:15,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:02:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:15,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:02:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611520410] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:02:15,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:02:15,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2025-03-16 14:02:15,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17970699] [2025-03-16 14:02:15,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:02:15,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 14:02:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:15,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 14:02:15,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2025-03-16 14:02:15,309 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:15,446 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2025-03-16 14:02:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:02:15,447 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-16 14:02:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:15,448 INFO L225 Difference]: With dead ends: 64 [2025-03-16 14:02:15,448 INFO L226 Difference]: Without dead ends: 37 [2025-03-16 14:02:15,448 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2025-03-16 14:02:15,448 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:02:15,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 102 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:02:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-16 14:02:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2025-03-16 14:02:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 14:02:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2025-03-16 14:02:15,453 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 22 [2025-03-16 14:02:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:15,453 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2025-03-16 14:02:15,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2025-03-16 14:02:15,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 14:02:15,454 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:15,454 INFO L218 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:15,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 14:02:15,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:15,655 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:15,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1759239082, now seen corresponding path program 5 times [2025-03-16 14:02:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:15,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310055059] [2025-03-16 14:02:15,656 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 14:02:15,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:15,660 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 8 equivalence classes. [2025-03-16 14:02:15,664 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 14:02:15,664 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 14:02:15,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 14:02:15,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:15,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310055059] [2025-03-16 14:02:15,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310055059] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:02:15,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120236821] [2025-03-16 14:02:15,738 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 14:02:15,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:15,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:02:15,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:02:15,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 14:02:15,764 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 8 equivalence classes. [2025-03-16 14:02:15,775 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 14:02:15,776 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 14:02:15,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:15,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 14:02:15,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:02:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:15,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:02:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 14:02:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120236821] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:02:15,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:02:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2025-03-16 14:02:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264803731] [2025-03-16 14:02:15,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:02:15,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 14:02:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:15,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 14:02:15,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2025-03-16 14:02:15,989 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:16,054 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2025-03-16 14:02:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:02:16,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-16 14:02:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:16,055 INFO L225 Difference]: With dead ends: 43 [2025-03-16 14:02:16,055 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 14:02:16,056 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2025-03-16 14:02:16,056 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:02:16,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:02:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 14:02:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-16 14:02:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 14:02:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 25 transitions. [2025-03-16 14:02:16,059 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 25 transitions. Word has length 24 [2025-03-16 14:02:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:16,059 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 25 transitions. [2025-03-16 14:02:16,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 25 transitions. [2025-03-16 14:02:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 14:02:16,060 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:02:16,060 INFO L218 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:02:16,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 14:02:16,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:16,261 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:02:16,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:02:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1184645257, now seen corresponding path program 1 times [2025-03-16 14:02:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:02:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328473553] [2025-03-16 14:02:16,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:02:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:02:16,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-16 14:02:16,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 14:02:16,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:02:16,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 14:02:16,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412459396] [2025-03-16 14:02:16,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:02:16,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:02:16,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:02:16,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 14:02:16,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-16 14:02:16,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 14:02:16,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:02:16,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:02:16,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 14:02:16,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:02:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 14:02:16,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:02:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 14:02:16,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:02:16,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328473553] [2025-03-16 14:02:16,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 14:02:16,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412459396] [2025-03-16 14:02:16,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412459396] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:02:16,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:02:16,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2025-03-16 14:02:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192068096] [2025-03-16 14:02:16,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:02:16,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:02:16,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:02:16,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:02:16,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:02:16,628 INFO L87 Difference]: Start difference. First operand 26 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 14:02:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:02:16,765 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2025-03-16 14:02:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:02:16,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2025-03-16 14:02:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:02:16,765 INFO L225 Difference]: With dead ends: 26 [2025-03-16 14:02:16,765 INFO L226 Difference]: Without dead ends: 0 [2025-03-16 14:02:16,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:02:16,766 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:02:16,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:02:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-16 14:02:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-16 14:02:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 14:02:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-16 14:02:16,767 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2025-03-16 14:02:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:02:16,767 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-16 14:02:16,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 14:02:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-16 14:02:16,767 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-16 14:02:16,772 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 14:02:16,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 14:02:16,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:02:16,976 INFO L422 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1] [2025-03-16 14:02:16,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-16 14:02:17,045 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 14:02:17,050 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~x~0 [2025-03-16 14:02:17,052 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~y~0 [2025-03-16 14:02:17,053 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~x~0 [2025-03-16 14:02:17,053 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~y~0 [2025-03-16 14:02:17,053 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~x~0 [2025-03-16 14:02:17,053 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~y~0 [2025-03-16 14:02:17,053 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~x~0 [2025-03-16 14:02:17,053 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~y~0 [2025-03-16 14:02:17,053 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~x~0 [2025-03-16 14:02:17,053 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~y~0 [2025-03-16 14:02:17,055 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~x~0 [2025-03-16 14:02:17,055 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: ~y~0 [2025-03-16 14:02:17,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 02:02:17 BoogieIcfgContainer [2025-03-16 14:02:17,056 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 14:02:17,057 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 14:02:17,057 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 14:02:17,057 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 14:02:17,057 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:02:12" (3/4) ... [2025-03-16 14:02:17,059 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-16 14:02:17,064 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-03-16 14:02:17,068 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2025-03-16 14:02:17,068 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2025-03-16 14:02:17,068 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-16 14:02:17,069 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 14:02:17,069 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-16 14:02:17,124 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 14:02:17,124 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 14:02:17,124 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 14:02:17,125 INFO L158 Benchmark]: Toolchain (without parser) took 5416.59ms. Allocated memory is still 167.8MB. Free memory was 124.9MB in the beginning and 117.8MB in the end (delta: 7.1MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. [2025-03-16 14:02:17,125 INFO L158 Benchmark]: CDTParser took 0.87ms. Allocated memory is still 201.3MB. Free memory is still 117.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:02:17,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.25ms. Allocated memory is still 167.8MB. Free memory was 124.9MB in the beginning and 113.7MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 14:02:17,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.32ms. Allocated memory is still 167.8MB. Free memory was 113.7MB in the beginning and 113.0MB in the end (delta: 684.5kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:02:17,127 INFO L158 Benchmark]: Boogie Preprocessor took 29.11ms. Allocated memory is still 167.8MB. Free memory was 113.0MB in the beginning and 111.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:02:17,127 INFO L158 Benchmark]: IcfgBuilder took 213.01ms. Allocated memory is still 167.8MB. Free memory was 111.7MB in the beginning and 99.2MB in the end (delta: 12.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-16 14:02:17,127 INFO L158 Benchmark]: TraceAbstraction took 4931.39ms. Allocated memory is still 167.8MB. Free memory was 98.5MB in the beginning and 124.4MB in the end (delta: -25.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:02:17,128 INFO L158 Benchmark]: Witness Printer took 67.53ms. Allocated memory is still 167.8MB. Free memory was 124.4MB in the beginning and 117.8MB in the end (delta: 6.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 14:02:17,129 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87ms. Allocated memory is still 201.3MB. Free memory is still 117.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.25ms. Allocated memory is still 167.8MB. Free memory was 124.9MB in the beginning and 113.7MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.32ms. Allocated memory is still 167.8MB. Free memory was 113.7MB in the beginning and 113.0MB in the end (delta: 684.5kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.11ms. Allocated memory is still 167.8MB. Free memory was 113.0MB in the beginning and 111.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 213.01ms. Allocated memory is still 167.8MB. Free memory was 111.7MB in the beginning and 99.2MB in the end (delta: 12.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 4931.39ms. Allocated memory is still 167.8MB. Free memory was 98.5MB in the beginning and 124.4MB in the end (delta: -25.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 67.53ms. Allocated memory is still 167.8MB. Free memory was 124.4MB in the beginning and 117.8MB in the end (delta: 6.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~x~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~y~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~x~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~y~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~x~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~y~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~x~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~y~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~x~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~y~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~x~0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: ~y~0 * 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 - PositiveResult [Line: 16]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 29 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 9, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 591 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 477 mSDsCounter, 38 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 761 IncrementalHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 38 mSolverCounterUnsat, 114 mSDtfsCounter, 761 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 166 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=6, InterpolantAutomatonStates: 68, 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, 9 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 276 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 1898 SizeOfPredicates, 18 NumberOfNonLiveVariables, 531 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 118/420 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Location Invariant Derived location invariant: ((((((((a == 27) && (b == 18)) || ((a == 45) && (b == 18))) || ((b == 0) && (a == 9))) || ((a == 9) && (b == 18))) || ((a == 9) && (b == 9))) || (((((long long) b + 1) <= 0) && (((long long) b + 9) <= a)) && (((long long) b + 9) <= ((long long) a * 3)))) || ((a == 63) && (b == 18))) RESULT: Ultimate proved your program to be correct! [2025-03-16 14:02:17,144 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 Result: TRUE