./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.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 d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:44:28,600 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:44:28,655 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:44:28,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:44:28,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:44:28,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:44:28,680 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:44:28,680 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:44:28,681 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:44:28,681 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:44:28,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:44:28,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:44:28,682 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:44:28,682 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:44:28,682 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:44:28,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:44:28,682 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:44:28,683 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:44:28,684 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:44:28,684 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:44:28,684 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:44:28,684 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:44:28,684 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:44:28,684 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:44:28,684 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:44:28,684 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:44:28,685 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:44:28,685 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 -> d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 [2025-03-03 13:44:28,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:44:28,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:44:28,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:44:28,899 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:44:28,899 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:44:28,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2025-03-03 13:44:29,969 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373d3adc6/6f59f11bc90c462ca3cc7639da57b96b/FLAG65de5860d [2025-03-03 13:44:30,154 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:44:30,156 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2025-03-03 13:44:30,161 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373d3adc6/6f59f11bc90c462ca3cc7639da57b96b/FLAG65de5860d [2025-03-03 13:44:30,539 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/373d3adc6/6f59f11bc90c462ca3cc7639da57b96b [2025-03-03 13:44:30,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:44:30,542 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:44:30,543 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:44:30,543 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:44:30,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:44:30,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b943e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30, skipping insertion in model container [2025-03-03 13:44:30,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,555 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:44:30,651 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2025-03-03 13:44:30,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:44:30,679 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:44:30,687 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2025-03-03 13:44:30,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:44:30,707 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:44:30,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30 WrapperNode [2025-03-03 13:44:30,708 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:44:30,709 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:44:30,709 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:44:30,709 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:44:30,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,731 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2025-03-03 13:44:30,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:44:30,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:44:30,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:44:30,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:44:30,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,741 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,751 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 13:44:30,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,757 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,759 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,759 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,762 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:44:30,763 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:44:30,763 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:44:30,763 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:44:30,764 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (1/1) ... [2025-03-03 13:44:30,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:44:30,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:30,792 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) [2025-03-03 13:44:30,797 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 [2025-03-03 13:44:30,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:44:30,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:44:30,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:44:30,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:44:30,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:44:30,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:44:30,854 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:44:30,856 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:44:30,961 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 13:44:30,962 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:44:30,968 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:44:30,968 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:44:30,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:44:30 BoogieIcfgContainer [2025-03-03 13:44:30,968 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:44:30,970 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:44:30,970 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:44:30,973 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:44:30,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:44:30" (1/3) ... [2025-03-03 13:44:30,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651c1a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:44:30, skipping insertion in model container [2025-03-03 13:44:30,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:44:30" (2/3) ... [2025-03-03 13:44:30,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651c1a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:44:30, skipping insertion in model container [2025-03-03 13:44:30,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:44:30" (3/3) ... [2025-03-03 13:44:30,976 INFO L128 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2025-03-03 13:44:30,987 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:44:30,988 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cohencu-ll_valuebound20.c that has 2 procedures, 26 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-03 13:44:31,029 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:44:31,038 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;@510fc91b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:44:31,038 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:44:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-03 13:44:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 13:44:31,043 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:31,044 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:31,044 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:31,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1735599928, now seen corresponding path program 1 times [2025-03-03 13:44:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:31,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490455928] [2025-03-03 13:44:31,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:31,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:31,094 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 13:44:31,104 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 13:44:31,104 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:31,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:44:31,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490455928] [2025-03-03 13:44:31,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490455928] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:31,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:31,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 13:44:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358034275] [2025-03-03 13:44:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:31,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:44:31,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:31,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:44:31,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:44:31,154 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2025-03-03 13:44:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:31,165 INFO L93 Difference]: Finished difference Result 49 states and 85 transitions. [2025-03-03 13:44:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:44:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2025-03-03 13:44:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:31,170 INFO L225 Difference]: With dead ends: 49 [2025-03-03 13:44:31,170 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 13:44:31,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:44:31,173 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:31,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:44:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 13:44:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-03 13:44:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 13:44:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2025-03-03 13:44:31,194 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2025-03-03 13:44:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:31,195 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2025-03-03 13:44:31,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2025-03-03 13:44:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2025-03-03 13:44:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 13:44:31,195 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:31,195 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:31,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:44:31,195 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:31,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1706970777, now seen corresponding path program 1 times [2025-03-03 13:44:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219057646] [2025-03-03 13:44:31,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:31,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:31,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 13:44:31,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 13:44:31,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:31,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:44:31,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:31,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219057646] [2025-03-03 13:44:31,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219057646] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:31,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:31,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:44:31,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810791924] [2025-03-03 13:44:31,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:31,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:44:31,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:31,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:44:31,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:44:31,369 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2025-03-03 13:44:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:31,451 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2025-03-03 13:44:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:44:31,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2025-03-03 13:44:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:31,452 INFO L225 Difference]: With dead ends: 28 [2025-03-03 13:44:31,452 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 13:44:31,452 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:44:31,453 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:31,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 13:44:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-03 13:44:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 13:44:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2025-03-03 13:44:31,466 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2025-03-03 13:44:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:31,468 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2025-03-03 13:44:31,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2025-03-03 13:44:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2025-03-03 13:44:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-03 13:44:31,468 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:31,468 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:31,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 13:44:31,468 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:31,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1634389675, now seen corresponding path program 1 times [2025-03-03 13:44:31,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:31,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59095660] [2025-03-03 13:44:31,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:31,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:31,474 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:44:31,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:44:31,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:31,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:31,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753381191] [2025-03-03 13:44:31,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:31,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:31,492 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) [2025-03-03 13:44:31,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:44:31,524 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 13:44:31,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 13:44:31,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:31,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:31,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:44:31,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:44:31,581 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:44:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:31,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59095660] [2025-03-03 13:44:31,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:31,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753381191] [2025-03-03 13:44:31,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753381191] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:31,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:31,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:44:31,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093798072] [2025-03-03 13:44:31,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:31,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:44:31,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:31,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:44:31,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:44:31,585 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2025-03-03 13:44:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:31,639 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2025-03-03 13:44:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:44:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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) Word has length 13 [2025-03-03 13:44:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:31,643 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:44:31,643 INFO L226 Difference]: Without dead ends: 42 [2025-03-03 13:44:31,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:44:31,644 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:31,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:44:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-03 13:44:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2025-03-03 13:44:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:44:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2025-03-03 13:44:31,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 13 [2025-03-03 13:44:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:31,662 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2025-03-03 13:44:31,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2025-03-03 13:44:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2025-03-03 13:44:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-03 13:44:31,662 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:31,662 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:31,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:31,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:31,863 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:31,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1549967769, now seen corresponding path program 1 times [2025-03-03 13:44:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:31,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157329646] [2025-03-03 13:44:31,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:31,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 13:44:31,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:44:31,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:31,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:31,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896317606] [2025-03-03 13:44:31,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:31,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:31,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:31,886 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) [2025-03-03 13:44:31,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:44:31,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 13:44:31,919 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:44:31,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:31,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:31,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:44:31,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:44:31,957 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:44:31,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157329646] [2025-03-03 13:44:31,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896317606] [2025-03-03 13:44:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896317606] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:31,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:31,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:44:31,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885542155] [2025-03-03 13:44:31,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:31,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:44:31,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:31,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:44:31,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:44:31,959 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:44:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:32,010 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2025-03-03 13:44:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:44:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-03 13:44:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:32,011 INFO L225 Difference]: With dead ends: 48 [2025-03-03 13:44:32,011 INFO L226 Difference]: Without dead ends: 46 [2025-03-03 13:44:32,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:44:32,012 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 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 [2025-03-03 13:44:32,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:44:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-03 13:44:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2025-03-03 13:44:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:44:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2025-03-03 13:44:32,023 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 18 [2025-03-03 13:44:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:32,023 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2025-03-03 13:44:32,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:44:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2025-03-03 13:44:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 13:44:32,023 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:32,024 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:32,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 13:44:32,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 13:44:32,224 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:32,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:32,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1816360149, now seen corresponding path program 1 times [2025-03-03 13:44:32,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:32,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953909116] [2025-03-03 13:44:32,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:32,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:32,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 13:44:32,237 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 13:44:32,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:32,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:32,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967110446] [2025-03-03 13:44:32,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:32,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:32,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:32,241 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) [2025-03-03 13:44:32,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:44:32,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 13:44:32,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 13:44:32,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:32,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:32,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:44:32,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:44:32,336 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:44:32,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:32,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953909116] [2025-03-03 13:44:32,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:32,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967110446] [2025-03-03 13:44:32,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967110446] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:44:32,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:44:32,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:44:32,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077070261] [2025-03-03 13:44:32,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:44:32,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:44:32,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:32,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:44:32,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:44:32,337 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 13:44:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:32,408 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2025-03-03 13:44:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:44:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2025-03-03 13:44:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:32,409 INFO L225 Difference]: With dead ends: 56 [2025-03-03 13:44:32,410 INFO L226 Difference]: Without dead ends: 44 [2025-03-03 13:44:32,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:44:32,411 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:32,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-03 13:44:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-03-03 13:44:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:44:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2025-03-03 13:44:32,423 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 23 [2025-03-03 13:44:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:32,424 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2025-03-03 13:44:32,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 13:44:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2025-03-03 13:44:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 13:44:32,424 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:32,424 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:32,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:32,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:32,625 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:32,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 788053417, now seen corresponding path program 1 times [2025-03-03 13:44:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:32,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478688917] [2025-03-03 13:44:32,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:32,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:32,630 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:44:32,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:44:32,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:32,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:32,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935107181] [2025-03-03 13:44:32,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:32,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:32,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:32,658 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) [2025-03-03 13:44:32,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:44:32,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:44:32,699 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:44:32,699 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:32,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:32,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-03 13:44:32,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:44:32,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:44:32,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:32,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478688917] [2025-03-03 13:44:32,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:32,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935107181] [2025-03-03 13:44:32,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935107181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:32,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:32,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-03-03 13:44:32,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690686881] [2025-03-03 13:44:32,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:32,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:44:32,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:32,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:44:32,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:44:32,926 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:44:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:33,127 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2025-03-03 13:44:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:44:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 39 [2025-03-03 13:44:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:33,129 INFO L225 Difference]: With dead ends: 66 [2025-03-03 13:44:33,129 INFO L226 Difference]: Without dead ends: 64 [2025-03-03 13:44:33,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-03-03 13:44:33,129 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:33,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:44:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-03 13:44:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2025-03-03 13:44:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:44:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2025-03-03 13:44:33,141 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 39 [2025-03-03 13:44:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:33,141 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2025-03-03 13:44:33,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:44:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2025-03-03 13:44:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 13:44:33,145 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:33,145 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:33,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:33,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:33,346 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:33,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1323853459, now seen corresponding path program 2 times [2025-03-03 13:44:33,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:33,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56497731] [2025-03-03 13:44:33,348 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:44:33,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:33,356 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-03 13:44:33,369 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:44:33,369 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:44:33,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:33,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812396242] [2025-03-03 13:44:33,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:44:33,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:33,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:33,373 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) [2025-03-03 13:44:33,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:44:33,400 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-03 13:44:33,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:44:33,414 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:44:33,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:33,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 13:44:33,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-03 13:44:33,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-03 13:44:33,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56497731] [2025-03-03 13:44:33,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812396242] [2025-03-03 13:44:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812396242] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:33,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:33,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-03-03 13:44:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324738161] [2025-03-03 13:44:33,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:33,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:44:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:33,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:44:33,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:44:33,651 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2025-03-03 13:44:37,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:44:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:37,883 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2025-03-03 13:44:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:44:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 44 [2025-03-03 13:44:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:37,885 INFO L225 Difference]: With dead ends: 80 [2025-03-03 13:44:37,885 INFO L226 Difference]: Without dead ends: 78 [2025-03-03 13:44:37,886 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:44:37,886 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:37,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 178 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2025-03-03 13:44:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-03 13:44:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2025-03-03 13:44:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 41 states have internal predecessors, (41), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2025-03-03 13:44:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2025-03-03 13:44:37,902 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 44 [2025-03-03 13:44:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:37,902 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2025-03-03 13:44:37,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2025-03-03 13:44:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2025-03-03 13:44:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 13:44:37,903 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:37,903 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:37,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 13:44:38,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:38,104 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:38,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash 162703401, now seen corresponding path program 3 times [2025-03-03 13:44:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:38,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134775698] [2025-03-03 13:44:38,104 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:44:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:38,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 6 equivalence classes. [2025-03-03 13:44:38,128 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 13:44:38,128 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:44:38,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:38,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091093745] [2025-03-03 13:44:38,132 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:44:38,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:38,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:38,135 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) [2025-03-03 13:44:38,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:44:38,155 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 6 equivalence classes. [2025-03-03 13:44:38,162 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 49 statements. [2025-03-03 13:44:38,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-03 13:44:38,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:38,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:44:38,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-03 13:44:38,236 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-03 13:44:38,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:38,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134775698] [2025-03-03 13:44:38,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:38,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091093745] [2025-03-03 13:44:38,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091093745] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:38,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:38,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2025-03-03 13:44:38,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116902190] [2025-03-03 13:44:38,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:38,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:44:38,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:38,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:44:38,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:44:38,317 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-03-03 13:44:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:38,506 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2025-03-03 13:44:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:44:38,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 49 [2025-03-03 13:44:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:38,508 INFO L225 Difference]: With dead ends: 92 [2025-03-03 13:44:38,509 INFO L226 Difference]: Without dead ends: 80 [2025-03-03 13:44:38,509 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:44:38,510 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:38,510 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 236 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-03 13:44:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2025-03-03 13:44:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:44:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2025-03-03 13:44:38,525 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 49 [2025-03-03 13:44:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:38,525 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2025-03-03 13:44:38,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-03-03 13:44:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2025-03-03 13:44:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 13:44:38,526 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:38,526 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:38,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:38,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:38,726 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:38,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:38,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1450305035, now seen corresponding path program 1 times [2025-03-03 13:44:38,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:38,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158915162] [2025-03-03 13:44:38,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:38,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:38,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-03 13:44:38,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 13:44:38,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:38,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:38,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882953329] [2025-03-03 13:44:38,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:38,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:38,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:38,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:44:38,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:44:38,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-03 13:44:38,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 13:44:38,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:38,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:38,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:44:38,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 13:44:38,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 13:44:39,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:39,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158915162] [2025-03-03 13:44:39,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:39,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882953329] [2025-03-03 13:44:39,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882953329] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:39,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:39,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-03 13:44:39,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852614985] [2025-03-03 13:44:39,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:39,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:44:39,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:39,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:44:39,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:44:39,033 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2025-03-03 13:44:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:39,202 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2025-03-03 13:44:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:44:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 65 [2025-03-03 13:44:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:39,203 INFO L225 Difference]: With dead ends: 93 [2025-03-03 13:44:39,203 INFO L226 Difference]: Without dead ends: 91 [2025-03-03 13:44:39,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:44:39,204 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:39,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-03 13:44:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2025-03-03 13:44:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:44:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2025-03-03 13:44:39,232 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 65 [2025-03-03 13:44:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:39,232 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2025-03-03 13:44:39,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2025-03-03 13:44:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2025-03-03 13:44:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-03 13:44:39,233 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:39,233 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:39,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 13:44:39,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:39,433 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:39,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1469357305, now seen corresponding path program 1 times [2025-03-03 13:44:39,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:39,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440823022] [2025-03-03 13:44:39,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:39,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-03 13:44:39,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-03 13:44:39,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:39,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:39,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928403713] [2025-03-03 13:44:39,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:44:39,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:39,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:44:39,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:44:39,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-03 13:44:39,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-03 13:44:39,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:44:39,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:39,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-03 13:44:39,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-03-03 13:44:39,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-03-03 13:44:39,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:39,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440823022] [2025-03-03 13:44:39,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928403713] [2025-03-03 13:44:39,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928403713] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:39,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:39,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-03-03 13:44:39,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650385671] [2025-03-03 13:44:39,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:39,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:44:39,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:39,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:44:39,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:44:39,732 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2025-03-03 13:44:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:39,953 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2025-03-03 13:44:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:44:39,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 70 [2025-03-03 13:44:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:39,956 INFO L225 Difference]: With dead ends: 122 [2025-03-03 13:44:39,956 INFO L226 Difference]: Without dead ends: 101 [2025-03-03 13:44:39,956 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:44:39,956 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:39,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-03 13:44:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2025-03-03 13:44:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2025-03-03 13:44:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2025-03-03 13:44:39,982 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 70 [2025-03-03 13:44:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:39,983 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2025-03-03 13:44:39,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2025-03-03 13:44:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2025-03-03 13:44:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-03-03 13:44:39,985 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:39,985 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:39,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 13:44:40,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:44:40,186 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:40,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash 319729053, now seen corresponding path program 2 times [2025-03-03 13:44:40,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:40,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797569919] [2025-03-03 13:44:40,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:44:40,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:40,193 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-03-03 13:44:40,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-03-03 13:44:40,228 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:44:40,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774280595] [2025-03-03 13:44:40,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:44:40,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:40,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:40,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:44:40,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:44:40,257 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-03-03 13:44:40,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-03-03 13:44:40,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:44:40,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:40,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-03 13:44:40,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 86 proven. 52 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2025-03-03 13:44:40,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:40,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:40,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797569919] [2025-03-03 13:44:40,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:40,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774280595] [2025-03-03 13:44:40,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774280595] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:44:40,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:44:40,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-03-03 13:44:40,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633382065] [2025-03-03 13:44:40,470 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:40,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:44:40,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:40,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:44:40,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:44:40,471 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2025-03-03 13:44:40,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:40,690 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2025-03-03 13:44:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:44:40,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 117 [2025-03-03 13:44:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:40,692 INFO L225 Difference]: With dead ends: 111 [2025-03-03 13:44:40,692 INFO L226 Difference]: Without dead ends: 103 [2025-03-03 13:44:40,692 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:44:40,692 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:40,692 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 232 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:44:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-03 13:44:40,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2025-03-03 13:44:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2025-03-03 13:44:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2025-03-03 13:44:40,710 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 117 [2025-03-03 13:44:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:40,710 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2025-03-03 13:44:40,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2025-03-03 13:44:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2025-03-03 13:44:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2025-03-03 13:44:40,711 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:40,711 INFO L218 NwaCegarLoop]: trace histogram [27, 26, 26, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:40,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:40,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:40,912 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:40,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash 35108337, now seen corresponding path program 3 times [2025-03-03 13:44:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:40,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273075267] [2025-03-03 13:44:40,912 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:44:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:40,918 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 143 statements into 21 equivalence classes. [2025-03-03 13:44:40,984 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 143 of 143 statements. [2025-03-03 13:44:40,984 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-03 13:44:40,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:40,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432394093] [2025-03-03 13:44:40,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:44:40,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:40,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:40,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:44:40,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:44:41,015 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 143 statements into 21 equivalence classes. [2025-03-03 13:44:41,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 143 statements. [2025-03-03 13:44:41,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:44:41,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:41,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:44:41,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 135 proven. 16 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2025-03-03 13:44:41,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 135 proven. 16 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2025-03-03 13:44:41,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273075267] [2025-03-03 13:44:41,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432394093] [2025-03-03 13:44:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432394093] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:41,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:41,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2025-03-03 13:44:41,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026769432] [2025-03-03 13:44:41,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:41,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:44:41,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:41,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:44:41,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:44:41,241 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:44:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:41,366 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2025-03-03 13:44:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:44:41,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 143 [2025-03-03 13:44:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:41,368 INFO L225 Difference]: With dead ends: 109 [2025-03-03 13:44:41,368 INFO L226 Difference]: Without dead ends: 105 [2025-03-03 13:44:41,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:44:41,368 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:41,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:44:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-03 13:44:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2025-03-03 13:44:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2025-03-03 13:44:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2025-03-03 13:44:41,396 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 143 [2025-03-03 13:44:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:41,396 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2025-03-03 13:44:41,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:44:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2025-03-03 13:44:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-03-03 13:44:41,397 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:44:41,398 INFO L218 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:44:41,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:41,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 13:44:41,602 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:44:41,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:44:41,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1789912203, now seen corresponding path program 2 times [2025-03-03 13:44:41,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:44:41,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684752517] [2025-03-03 13:44:41,602 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:44:41,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:44:41,609 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 148 statements into 2 equivalence classes. [2025-03-03 13:44:41,643 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 148 of 148 statements. [2025-03-03 13:44:41,643 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:44:41,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:44:41,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282950267] [2025-03-03 13:44:41,645 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:44:41,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:44:41,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:44:41,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:44:41,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:44:41,679 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 148 statements into 2 equivalence classes. [2025-03-03 13:44:41,714 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 148 of 148 statements. [2025-03-03 13:44:41,714 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:44:41,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:44:41,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 13:44:41,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:44:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2025-03-03 13:44:41,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:44:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 128 proven. 28 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2025-03-03 13:44:42,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:44:42,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684752517] [2025-03-03 13:44:42,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:44:42,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282950267] [2025-03-03 13:44:42,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282950267] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:44:42,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:44:42,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2025-03-03 13:44:42,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518797901] [2025-03-03 13:44:42,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:44:42,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:44:42,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:44:42,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:44:42,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:44:42,454 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 19 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 11 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) [2025-03-03 13:44:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:44:42,868 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2025-03-03 13:44:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:44:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 11 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) Word has length 148 [2025-03-03 13:44:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:44:42,869 INFO L225 Difference]: With dead ends: 130 [2025-03-03 13:44:42,869 INFO L226 Difference]: Without dead ends: 0 [2025-03-03 13:44:42,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:44:42,870 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:44:42,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 328 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:44:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-03 13:44:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-03 13:44:42,871 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) [2025-03-03 13:44:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-03 13:44:42,871 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 148 [2025-03-03 13:44:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:44:42,871 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-03 13:44:42,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 11 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) [2025-03-03 13:44:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-03 13:44:42,871 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-03 13:44:42,873 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-03 13:44:42,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 13:44:43,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:44:43,076 INFO L422 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1] [2025-03-03 13:44:43,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-03 13:44:45,578 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-03 13:44:45,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 01:44:45 BoogieIcfgContainer [2025-03-03 13:44:45,587 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-03 13:44:45,588 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-03 13:44:45,588 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-03 13:44:45,588 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-03 13:44:45,588 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:44:30" (3/4) ... [2025-03-03 13:44:45,590 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-03 13:44:45,593 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-03-03 13:44:45,595 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2025-03-03 13:44:45,595 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-03 13:44:45,595 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-03 13:44:45,595 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-03 13:44:45,640 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-03 13:44:45,640 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-03 13:44:45,640 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-03 13:44:45,641 INFO L158 Benchmark]: Toolchain (without parser) took 15098.93ms. Allocated memory was 142.6MB in the beginning and 302.0MB in the end (delta: 159.4MB). Free memory was 105.0MB in the beginning and 257.1MB in the end (delta: -152.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:44:45,641 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 13:44:45,641 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.17ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 94.4MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:44:45,641 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.68ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 92.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 13:44:45,641 INFO L158 Benchmark]: Boogie Preprocessor took 28.23ms. Allocated memory is still 142.6MB. Free memory was 92.6MB in the beginning and 91.5MB in the end (delta: 1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:44:45,641 INFO L158 Benchmark]: IcfgBuilder took 205.42ms. Allocated memory is still 142.6MB. Free memory was 91.5MB in the beginning and 78.8MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:44:45,642 INFO L158 Benchmark]: TraceAbstraction took 14617.57ms. Allocated memory was 142.6MB in the beginning and 302.0MB in the end (delta: 159.4MB). Free memory was 78.8MB in the beginning and 261.8MB in the end (delta: -182.9MB). Peak memory consumption was 143.6MB. Max. memory is 16.1GB. [2025-03-03 13:44:45,642 INFO L158 Benchmark]: Witness Printer took 52.42ms. Allocated memory is still 302.0MB. Free memory was 261.8MB in the beginning and 257.1MB in the end (delta: 4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:44:45,643 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.17ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 94.4MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.68ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 92.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.23ms. Allocated memory is still 142.6MB. Free memory was 92.6MB in the beginning and 91.5MB in the end (delta: 1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 205.42ms. Allocated memory is still 142.6MB. Free memory was 91.5MB in the beginning and 78.8MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 14617.57ms. Allocated memory was 142.6MB in the beginning and 302.0MB in the end (delta: 159.4MB). Free memory was 78.8MB in the beginning and 261.8MB in the end (delta: -182.9MB). Peak memory consumption was 143.6MB. Max. memory is 16.1GB. * Witness Printer took 52.42ms. Allocated memory is still 302.0MB. Free memory was 261.8MB in the beginning and 257.1MB in the end (delta: 4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.1s, OverallIterations: 13, TraceHistogramMax: 28, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 113 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 1853 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1494 mSDsCounter, 234 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1793 IncrementalHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 234 mSolverCounterUnsat, 359 mSDtfsCounter, 1793 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1312 GetRequests, 1178 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=12, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 47 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 1474 NumberOfCodeBlocks, 1331 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1283 ConstructedInterpolants, 0 QuantifiedInterpolants, 4419 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1481 ConjunctsInSsa, 231 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 8217/8504 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: 33]: Location Invariant Derived location invariant: (((((((__int128) n * n) * n) == x) && ((((__int128) y * z) + ((__int128) 2 * z)) == ((6 + ((__int128) y * 12)) + ((__int128) x * 18)))) && (((((__int128) y * z) + 6) + ((__int128) z * z)) == ((((__int128) z * 4) + ((__int128) x * 18)) + ((__int128) y * 24)))) && ((n < (a + 1)) || (((((__int128) 2 * y) + (6 * a)) + 10) == (((__int128) a * z) + ((__int128) 2 * z))))) RESULT: Ultimate proved your program to be correct! [2025-03-03 13:44:45,653 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