./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i -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 d02047a3b9d197f6609f19d430d458b8d82d1972f1adb7857eb26188e13a592b --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:08:00,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:08:00,945 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:08:00,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:08:00,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:08:00,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:08:00,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:08:00,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:08:00,970 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:08:00,971 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:08:00,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:08:00,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:08:00,972 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:08:00,972 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:08:00,972 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:08:00,972 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:08:00,972 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:08:00,972 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:08:00,973 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:08:00,973 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:08:00,974 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:08:00,974 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:08:00,975 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:08:00,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:08:00,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:08:00,975 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d02047a3b9d197f6609f19d430d458b8d82d1972f1adb7857eb26188e13a592b [2025-03-16 18:08:01,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:08:01,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:08:01,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:08:01,217 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:08:01,218 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:08:01,219 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i [2025-03-16 18:08:02,338 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3be8dd174/61db252d118c43ed8c6fa2f5d3cbe9fc/FLAG30b461410 [2025-03-16 18:08:02,548 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:08:02,549 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i [2025-03-16 18:08:02,556 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3be8dd174/61db252d118c43ed8c6fa2f5d3cbe9fc/FLAG30b461410 [2025-03-16 18:08:02,890 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3be8dd174/61db252d118c43ed8c6fa2f5d3cbe9fc [2025-03-16 18:08:02,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:08:02,893 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:08:02,894 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:08:02,894 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:08:02,897 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:08:02,897 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:08:02" (1/1) ... [2025-03-16 18:08:02,898 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cfb9ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:02, skipping insertion in model container [2025-03-16 18:08:02,898 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:08:02" (1/1) ... [2025-03-16 18:08:02,909 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:08:03,011 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/divbin_valuebound5.i[950,963] [2025-03-16 18:08:03,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:08:03,039 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:08:03,048 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/divbin_valuebound5.i[950,963] [2025-03-16 18:08:03,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:08:03,061 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:08:03,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03 WrapperNode [2025-03-16 18:08:03,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:08:03,062 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:08:03,062 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:08:03,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:08:03,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,077 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2025-03-16 18:08:03,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:08:03,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:08:03,078 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:08:03,078 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:08:03,083 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,083 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,083 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,089 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 18:08:03,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,090 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,091 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:08:03,093 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:08:03,093 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:08:03,094 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:08:03,094 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (1/1) ... [2025-03-16 18:08:03,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:08:03,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:03,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 18:08:03,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 18:08:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:08:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 18:08:03,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 18:08:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:08:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:08:03,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:08:03,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:08:03,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:08:03,175 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:08:03,177 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:08:03,264 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-16 18:08:03,264 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:08:03,269 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:08:03,270 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:08:03,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:08:03 BoogieIcfgContainer [2025-03-16 18:08:03,270 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:08:03,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:08:03,271 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:08:03,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:08:03,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:08:02" (1/3) ... [2025-03-16 18:08:03,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78639ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:08:03, skipping insertion in model container [2025-03-16 18:08:03,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:08:03" (2/3) ... [2025-03-16 18:08:03,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78639ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:08:03, skipping insertion in model container [2025-03-16 18:08:03,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:08:03" (3/3) ... [2025-03-16 18:08:03,277 INFO L128 eAbstractionObserver]: Analyzing ICFG divbin_valuebound5.i [2025-03-16 18:08:03,286 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:08:03,287 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG divbin_valuebound5.i that has 3 procedures, 25 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 18:08:03,317 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:08:03,324 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;@7465367a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:08:03,324 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:08:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:08:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-16 18:08:03,331 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:03,332 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:03,332 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:03,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1306365374, now seen corresponding path program 1 times [2025-03-16 18:08:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:03,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630814116] [2025-03-16 18:08:03,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:03,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:03,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 18:08:03,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 18:08:03,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:03,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 18:08:03,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630814116] [2025-03-16 18:08:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630814116] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072215994] [2025-03-16 18:08:03,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:03,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:03,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:03,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:08:03,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:08:03,498 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 18:08:03,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 18:08:03,522 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:03,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:03,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-16 18:08:03,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 18:08:03,537 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:08:03,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072215994] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:03,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:08:03,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-16 18:08:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234210365] [2025-03-16 18:08:03,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:03,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:08:03,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:03,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:08:03,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:08:03,561 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:08:03,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:03,575 INFO L93 Difference]: Finished difference Result 48 states and 73 transitions. [2025-03-16 18:08:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:08:03,577 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2025-03-16 18:08:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:03,581 INFO L225 Difference]: With dead ends: 48 [2025-03-16 18:08:03,581 INFO L226 Difference]: Without dead ends: 22 [2025-03-16 18:08:03,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:08:03,587 INFO L435 NwaCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:03,589 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-16 18:08:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-16 18:08:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-16 18:08:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2025-03-16 18:08:03,614 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2025-03-16 18:08:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:03,615 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2025-03-16 18:08:03,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:08:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2025-03-16 18:08:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-16 18:08:03,616 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:03,616 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:03,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 18:08:03,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-16 18:08:03,823 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:03,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:03,823 INFO L85 PathProgramCache]: Analyzing trace with hash 366638368, now seen corresponding path program 1 times [2025-03-16 18:08:03,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:03,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152286209] [2025-03-16 18:08:03,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:03,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:03,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 18:08:03,870 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 18:08:03,871 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:03,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:08:03,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678501563] [2025-03-16 18:08:03,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:03,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:03,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:03,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:08:03,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:08:03,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 18:08:03,919 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 18:08:03,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:03,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:03,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 18:08:03,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 18:08:04,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:08:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:08:04,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:04,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152286209] [2025-03-16 18:08:04,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:08:04,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678501563] [2025-03-16 18:08:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678501563] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:04,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:08:04,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2025-03-16 18:08:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010719495] [2025-03-16 18:08:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:04,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:08:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:04,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:08:04,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-16 18:08:04,352 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:08:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:04,653 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-03-16 18:08:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:08:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2025-03-16 18:08:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:04,654 INFO L225 Difference]: With dead ends: 32 [2025-03-16 18:08:04,654 INFO L226 Difference]: Without dead ends: 29 [2025-03-16 18:08:04,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:08:04,655 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:04,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:08:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-16 18:08:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-03-16 18:08:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:08:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-16 18:08:04,663 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2025-03-16 18:08:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:04,663 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-16 18:08:04,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:08:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-16 18:08:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-16 18:08:04,664 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:04,664 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:04,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 18:08:04,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2025-03-16 18:08:04,865 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:04,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:04,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1483897537, now seen corresponding path program 1 times [2025-03-16 18:08:04,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:04,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650946130] [2025-03-16 18:08:04,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:04,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:04,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 18:08:04,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 18:08:04,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:04,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:08:04,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126365948] [2025-03-16 18:08:04,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:04,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:04,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:04,906 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:08:04,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:08:04,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 18:08:04,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 18:08:04,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:04,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:04,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 18:08:04,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 18:08:05,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:08:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 18:08:05,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:05,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650946130] [2025-03-16 18:08:05,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:08:05,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126365948] [2025-03-16 18:08:05,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126365948] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:05,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:08:05,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2025-03-16 18:08:05,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820459389] [2025-03-16 18:08:05,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:05,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:08:05,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:05,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:08:05,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:08:05,143 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:08:09,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-03-16 18:08:13,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-03-16 18:08:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:13,245 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2025-03-16 18:08:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:08:13,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-03-16 18:08:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:13,249 INFO L225 Difference]: With dead ends: 38 [2025-03-16 18:08:13,249 INFO L226 Difference]: Without dead ends: 36 [2025-03-16 18:08:13,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:08:13,253 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:13,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 83 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2025-03-16 18:08:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-16 18:08:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-16 18:08:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 18:08:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2025-03-16 18:08:13,263 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 29 [2025-03-16 18:08:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:13,263 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2025-03-16 18:08:13,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:08:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2025-03-16 18:08:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 18:08:13,264 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:13,264 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:13,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 18:08:13,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:13,465 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:13,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash 383089367, now seen corresponding path program 1 times [2025-03-16 18:08:13,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:13,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967651131] [2025-03-16 18:08:13,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:13,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:13,479 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-16 18:08:13,547 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 18:08:13,552 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:13,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:08:14,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:14,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967651131] [2025-03-16 18:08:14,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967651131] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:08:14,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:08:14,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 18:08:14,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299161315] [2025-03-16 18:08:14,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:08:14,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:08:14,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:14,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:08:14,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:08:14,290 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:08:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:14,344 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2025-03-16 18:08:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 18:08:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2025-03-16 18:08:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:14,346 INFO L225 Difference]: With dead ends: 44 [2025-03-16 18:08:14,347 INFO L226 Difference]: Without dead ends: 28 [2025-03-16 18:08:14,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:08:14,348 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:14,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:08:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-16 18:08:14,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-16 18:08:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:08:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2025-03-16 18:08:14,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 35 [2025-03-16 18:08:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:14,361 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2025-03-16 18:08:14,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:08:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2025-03-16 18:08:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 18:08:14,363 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:14,363 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:14,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 18:08:14,363 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:14,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:14,365 INFO L85 PathProgramCache]: Analyzing trace with hash 612161536, now seen corresponding path program 1 times [2025-03-16 18:08:14,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:14,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641989564] [2025-03-16 18:08:14,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:14,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:14,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-16 18:08:14,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 18:08:14,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:14,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:08:14,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:14,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641989564] [2025-03-16 18:08:14,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641989564] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:14,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335347707] [2025-03-16 18:08:14,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:14,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:14,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:14,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:08:14,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:08:14,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-16 18:08:14,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 18:08:14,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:14,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:14,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:08:14,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 18:08:14,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:08:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 18:08:14,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335347707] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:08:14,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:08:14,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2025-03-16 18:08:14,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692850989] [2025-03-16 18:08:14,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:08:14,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 18:08:14,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:14,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 18:08:14,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-03-16 18:08:14,823 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:08:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:15,278 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2025-03-16 18:08:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 18:08:15,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2025-03-16 18:08:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:15,279 INFO L225 Difference]: With dead ends: 42 [2025-03-16 18:08:15,279 INFO L226 Difference]: Without dead ends: 30 [2025-03-16 18:08:15,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-16 18:08:15,280 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:15,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 132 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:08:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-16 18:08:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2025-03-16 18:08:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:08:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2025-03-16 18:08:15,290 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 35 [2025-03-16 18:08:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:15,291 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2025-03-16 18:08:15,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:08:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2025-03-16 18:08:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 18:08:15,293 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:15,293 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:15,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 18:08:15,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:15,497 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:15,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1825888728, now seen corresponding path program 1 times [2025-03-16 18:08:15,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:15,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180800713] [2025-03-16 18:08:15,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:15,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:15,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 18:08:15,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 18:08:15,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:15,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:08:15,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792277911] [2025-03-16 18:08:15,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:08:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:15,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:15,528 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:08:15,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:08:15,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 18:08:15,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 18:08:15,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:08:15,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:15,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 18:08:15,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 18:08:15,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:08:16,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:16,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180800713] [2025-03-16 18:08:16,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:08:16,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792277911] [2025-03-16 18:08:16,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792277911] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:16,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:08:16,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2025-03-16 18:08:16,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453616726] [2025-03-16 18:08:16,075 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:08:16,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 18:08:16,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:16,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 18:08:16,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-16 18:08:16,077 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 18:08:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:16,207 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2025-03-16 18:08:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:08:16,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2025-03-16 18:08:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:16,209 INFO L225 Difference]: With dead ends: 39 [2025-03-16 18:08:16,211 INFO L226 Difference]: Without dead ends: 37 [2025-03-16 18:08:16,211 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:08:16,212 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:16,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:08:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-16 18:08:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2025-03-16 18:08:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 18:08:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-03-16 18:08:16,226 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 36 [2025-03-16 18:08:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:16,227 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-03-16 18:08:16,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 18:08:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-03-16 18:08:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 18:08:16,228 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:16,228 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:16,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 18:08:16,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:16,432 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:16,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1912264479, now seen corresponding path program 2 times [2025-03-16 18:08:16,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:16,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665567832] [2025-03-16 18:08:16,437 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:08:16,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:16,451 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-16 18:08:16,541 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 18:08:16,545 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:08:16,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 18:08:17,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:17,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665567832] [2025-03-16 18:08:17,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665567832] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:17,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769924541] [2025-03-16 18:08:17,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:08:17,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:17,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:17,316 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:08:17,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:08:17,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-16 18:08:17,406 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 18:08:17,406 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:08:17,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:17,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 18:08:17,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 18:08:18,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:08:19,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769924541] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:08:19,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:08:19,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2025-03-16 18:08:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156941741] [2025-03-16 18:08:19,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:08:19,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 18:08:19,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:19,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 18:08:19,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-03-16 18:08:19,529 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-16 18:08:21,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:08:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:08:21,461 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2025-03-16 18:08:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 18:08:21,461 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 43 [2025-03-16 18:08:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:08:21,465 INFO L225 Difference]: With dead ends: 62 [2025-03-16 18:08:21,465 INFO L226 Difference]: Without dead ends: 38 [2025-03-16 18:08:21,465 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2025-03-16 18:08:21,467 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-16 18:08:21,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 157 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-16 18:08:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-16 18:08:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-16 18:08:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 18:08:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2025-03-16 18:08:21,483 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 43 [2025-03-16 18:08:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:08:21,483 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2025-03-16 18:08:21,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-16 18:08:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2025-03-16 18:08:21,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 18:08:21,484 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:08:21,484 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:08:21,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 18:08:21,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:21,688 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:08:21,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:08:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1383048480, now seen corresponding path program 3 times [2025-03-16 18:08:21,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:08:21,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006229272] [2025-03-16 18:08:21,690 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:08:21,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:08:21,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 4 equivalence classes. [2025-03-16 18:08:21,858 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 18:08:21,858 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:08:21,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:08:21,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158720322] [2025-03-16 18:08:21,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:08:21,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:08:21,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:08:21,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:08:21,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:08:21,906 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 4 equivalence classes. [2025-03-16 18:08:22,202 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 38 of 44 statements. [2025-03-16 18:08:22,202 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 18:08:22,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:08:22,204 WARN L254 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 18:08:22,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:08:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 18:08:24,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:08:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 18:08:44,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:08:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006229272] [2025-03-16 18:08:44,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:08:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158720322] [2025-03-16 18:08:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158720322] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:08:44,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:08:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2025-03-16 18:08:44,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064831530] [2025-03-16 18:08:44,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:08:44,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-16 18:08:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:08:44,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-16 18:08:44,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=567, Unknown=3, NotChecked=0, Total=702 [2025-03-16 18:08:44,154 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 27 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12)