./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_allDiff2_ground.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/array-examples/standard_allDiff2_ground.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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:18:39,742 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:18:39,799 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:18:39,804 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:18:39,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:18:39,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:18:39,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:18:39,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:18:39,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:18:39,824 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:18:39,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:18:39,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:18:39,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:18:39,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:18:39,826 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:18:39,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:18:39,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:18:39,826 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:18:39,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:18:39,826 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:18:39,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:18:39,827 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:18:39,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:18:39,828 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:18:39,828 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:18:39,828 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:18:39,828 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:18:39,828 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:18:39,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:18:39,828 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:18:39,828 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:18:39,829 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:18:39,829 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:18:39,829 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 -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2025-03-16 13:18:40,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:18:40,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:18:40,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:18:40,029 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:18:40,030 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:18:40,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2025-03-16 13:18:41,155 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b13429d71/fcf48b83021b4f22aaa62d7f5d979316/FLAG8760d8ded [2025-03-16 13:18:41,358 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:18:41,358 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2025-03-16 13:18:41,377 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b13429d71/fcf48b83021b4f22aaa62d7f5d979316/FLAG8760d8ded [2025-03-16 13:18:41,421 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b13429d71/fcf48b83021b4f22aaa62d7f5d979316 [2025-03-16 13:18:41,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:18:41,427 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:18:41,429 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:18:41,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:18:41,433 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:18:41,434 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77288d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41, skipping insertion in model container [2025-03-16 13:18:41,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,448 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:18:41,551 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/array-examples/standard_allDiff2_ground.i[817,830] [2025-03-16 13:18:41,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:18:41,574 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:18:41,581 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/array-examples/standard_allDiff2_ground.i[817,830] [2025-03-16 13:18:41,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:18:41,600 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:18:41,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41 WrapperNode [2025-03-16 13:18:41,601 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:18:41,602 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:18:41,602 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:18:41,602 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:18:41,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,611 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,623 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2025-03-16 13:18:41,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:18:41,625 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:18:41,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:18:41,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:18:41,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,632 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,642 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-16 13:18:41,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,649 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:18:41,652 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:18:41,652 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:18:41,653 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:18:41,654 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (1/1) ... [2025-03-16 13:18:41,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:18:41,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:41,676 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 13:18:41,679 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 13:18:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:18:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:18:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:18:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:18:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:18:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:18:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:18:41,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:18:41,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:18:41,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:18:41,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:18:41,750 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:18:41,751 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:18:41,837 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L17: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-16 13:18:41,841 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-03-16 13:18:41,842 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:18:41,847 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:18:41,847 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:18:41,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:18:41 BoogieIcfgContainer [2025-03-16 13:18:41,848 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:18:41,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:18:41,850 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:18:41,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:18:41,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:18:41" (1/3) ... [2025-03-16 13:18:41,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2583073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:18:41, skipping insertion in model container [2025-03-16 13:18:41,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:18:41" (2/3) ... [2025-03-16 13:18:41,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2583073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:18:41, skipping insertion in model container [2025-03-16 13:18:41,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:18:41" (3/3) ... [2025-03-16 13:18:41,855 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2025-03-16 13:18:41,865 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:18:41,866 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_allDiff2_ground.i that has 1 procedures, 17 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-03-16 13:18:41,905 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:18:41,912 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;@3cfde4f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:18:41,912 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:18:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 13:18:41,919 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:41,919 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:41,919 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:41,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:41,923 INFO L85 PathProgramCache]: Analyzing trace with hash 29118709, now seen corresponding path program 1 times [2025-03-16 13:18:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:41,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890529634] [2025-03-16 13:18:41,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:41,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:41,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:18:41,990 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:18:41,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:41,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:18:42,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:42,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890529634] [2025-03-16 13:18:42,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890529634] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:42,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:18:42,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:18:42,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805619479] [2025-03-16 13:18:42,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:42,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:18:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:42,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:18:42,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:18:42,095 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:42,128 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2025-03-16 13:18:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:18:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 13:18:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:42,135 INFO L225 Difference]: With dead ends: 33 [2025-03-16 13:18:42,135 INFO L226 Difference]: Without dead ends: 14 [2025-03-16 13:18:42,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:18:42,141 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:42,142 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-16 13:18:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-16 13:18:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2025-03-16 13:18:42,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 8 [2025-03-16 13:18:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:42,163 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2025-03-16 13:18:42,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2025-03-16 13:18:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:18:42,163 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:42,164 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:42,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:18:42,164 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:42,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:42,165 INFO L85 PathProgramCache]: Analyzing trace with hash -531984820, now seen corresponding path program 1 times [2025-03-16 13:18:42,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:42,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725507312] [2025-03-16 13:18:42,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:42,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:42,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:18:42,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:18:42,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:42,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:18:42,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:42,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725507312] [2025-03-16 13:18:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725507312] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484440935] [2025-03-16 13:18:42,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:42,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:42,232 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 13:18:42,233 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 13:18:42,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:18:42,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:18:42,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:42,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:42,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 13:18:42,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:42,319 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:18:42,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484440935] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:42,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:18:42,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 5 [2025-03-16 13:18:42,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846162792] [2025-03-16 13:18:42,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:42,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:18:42,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:42,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:18:42,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:18:42,321 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:42,351 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2025-03-16 13:18:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:18:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 13:18:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:42,352 INFO L225 Difference]: With dead ends: 25 [2025-03-16 13:18:42,353 INFO L226 Difference]: Without dead ends: 18 [2025-03-16 13:18:42,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:18:42,353 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:42,353 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-16 13:18:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2025-03-16 13:18:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2025-03-16 13:18:42,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2025-03-16 13:18:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:42,356 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2025-03-16 13:18:42,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2025-03-16 13:18:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 13:18:42,358 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:42,358 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:42,366 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 13:18:42,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:42,563 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:42,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash 155495175, now seen corresponding path program 1 times [2025-03-16 13:18:42,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:42,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420028192] [2025-03-16 13:18:42,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:42,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:42,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:18:42,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:18:42,588 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:42,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:42,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:42,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420028192] [2025-03-16 13:18:42,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420028192] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:42,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394739813] [2025-03-16 13:18:42,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:42,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:42,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:42,642 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 13:18:42,644 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 13:18:42,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:18:42,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:18:42,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:42,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:42,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 13:18:42,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:42,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:42,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394739813] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:42,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:42,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-03-16 13:18:42,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425941346] [2025-03-16 13:18:42,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:42,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 13:18:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:42,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 13:18:42,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:18:42,719 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:42,758 INFO L93 Difference]: Finished difference Result 38 states and 56 transitions. [2025-03-16 13:18:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:18:42,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 13:18:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:42,759 INFO L225 Difference]: With dead ends: 38 [2025-03-16 13:18:42,759 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 13:18:42,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:18:42,760 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:42,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:42,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 13:18:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2025-03-16 13:18:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2025-03-16 13:18:42,763 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 11 [2025-03-16 13:18:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:42,763 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2025-03-16 13:18:42,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:42,763 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2025-03-16 13:18:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 13:18:42,763 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:42,764 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:42,769 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 13:18:42,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-16 13:18:42,964 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:42,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:42,965 INFO L85 PathProgramCache]: Analyzing trace with hash 303043888, now seen corresponding path program 2 times [2025-03-16 13:18:42,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:42,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667294820] [2025-03-16 13:18:42,965 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:42,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:42,980 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-16 13:18:42,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:18:42,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:42,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:18:43,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667294820] [2025-03-16 13:18:43,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667294820] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220802317] [2025-03-16 13:18:43,084 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:43,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:43,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:43,086 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 13:18:43,088 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 13:18:43,115 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-16 13:18:43,132 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:18:43,132 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:43,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:43,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:18:43,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:43,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:18:43,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220802317] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:43,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:43,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2025-03-16 13:18:43,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42236889] [2025-03-16 13:18:43,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:43,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 13:18:43,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:43,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 13:18:43,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:18:43,265 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:43,362 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2025-03-16 13:18:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:18:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 13:18:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:43,363 INFO L225 Difference]: With dead ends: 73 [2025-03-16 13:18:43,363 INFO L226 Difference]: Without dead ends: 59 [2025-03-16 13:18:43,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:18:43,364 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:43,364 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 74 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:18:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-16 13:18:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2025-03-16 13:18:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2025-03-16 13:18:43,370 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 14 [2025-03-16 13:18:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:43,370 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2025-03-16 13:18:43,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2025-03-16 13:18:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 13:18:43,371 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:43,371 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:43,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:18:43,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:43,572 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:43,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1325405696, now seen corresponding path program 1 times [2025-03-16 13:18:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:43,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348931899] [2025-03-16 13:18:43,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:43,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:43,584 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 13:18:43,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 13:18:43,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:43,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-16 13:18:43,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:43,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348931899] [2025-03-16 13:18:43,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348931899] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:43,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633004796] [2025-03-16 13:18:43,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:18:43,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:43,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:43,802 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 13:18:43,804 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 13:18:43,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 13:18:43,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 13:18:43,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:18:43,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:43,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:18:43,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-16 13:18:43,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-16 13:18:44,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633004796] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:44,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:44,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-16 13:18:44,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929650875] [2025-03-16 13:18:44,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:44,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:18:44,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:44,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:18:44,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:18:44,108 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:44,250 INFO L93 Difference]: Finished difference Result 162 states and 251 transitions. [2025-03-16 13:18:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:18:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-03-16 13:18:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:44,252 INFO L225 Difference]: With dead ends: 162 [2025-03-16 13:18:44,252 INFO L226 Difference]: Without dead ends: 117 [2025-03-16 13:18:44,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:18:44,253 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 315 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:44,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 116 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:18:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-03-16 13:18:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 69. [2025-03-16 13:18:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2025-03-16 13:18:44,265 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 39 [2025-03-16 13:18:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:44,265 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2025-03-16 13:18:44,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2025-03-16 13:18:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 13:18:44,266 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:44,266 INFO L218 NwaCegarLoop]: trace histogram [22, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:44,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 13:18:44,466 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 13:18:44,467 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:44,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:44,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1225197760, now seen corresponding path program 2 times [2025-03-16 13:18:44,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:44,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320350971] [2025-03-16 13:18:44,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:44,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:44,485 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-16 13:18:44,513 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:18:44,514 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:44,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-16 13:18:45,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:45,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320350971] [2025-03-16 13:18:45,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320350971] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:45,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229429548] [2025-03-16 13:18:45,028 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:18:45,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:45,031 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 13:18:45,032 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 13:18:45,087 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-16 13:18:45,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 13:18:45,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:18:45,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:45,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 13:18:45,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-16 13:18:45,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-16 13:18:45,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229429548] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:45,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:45,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2025-03-16 13:18:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113835450] [2025-03-16 13:18:45,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:45,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-16 13:18:45,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:45,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-16 13:18:45,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 13:18:45,801 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 47 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:46,178 INFO L93 Difference]: Finished difference Result 282 states and 455 transitions. [2025-03-16 13:18:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 13:18:46,178 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 47 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-16 13:18:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:46,180 INFO L225 Difference]: With dead ends: 282 [2025-03-16 13:18:46,182 INFO L226 Difference]: Without dead ends: 237 [2025-03-16 13:18:46,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 13:18:46,184 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 770 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:46,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 172 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:18:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2025-03-16 13:18:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 93. [2025-03-16 13:18:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 92 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2025-03-16 13:18:46,201 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 51 [2025-03-16 13:18:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:46,201 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2025-03-16 13:18:46,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 47 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2025-03-16 13:18:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 13:18:46,204 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:46,204 INFO L218 NwaCegarLoop]: trace histogram [46, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:46,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 13:18:46,405 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 13:18:46,405 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:46,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash -874715584, now seen corresponding path program 3 times [2025-03-16 13:18:46,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:46,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551803940] [2025-03-16 13:18:46,406 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:18:46,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:46,430 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 24 equivalence classes. [2025-03-16 13:18:46,438 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 19 of 75 statements. [2025-03-16 13:18:46,438 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:18:46,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2025-03-16 13:18:46,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551803940] [2025-03-16 13:18:46,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551803940] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:18:46,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:18:46,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 13:18:46,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837946164] [2025-03-16 13:18:46,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:18:46,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 13:18:46,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:46,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 13:18:46,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:18:46,473 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:46,514 INFO L93 Difference]: Finished difference Result 164 states and 226 transitions. [2025-03-16 13:18:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:18:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2025-03-16 13:18:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:46,516 INFO L225 Difference]: With dead ends: 164 [2025-03-16 13:18:46,516 INFO L226 Difference]: Without dead ends: 157 [2025-03-16 13:18:46,516 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:18:46,516 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:46,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:18:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-03-16 13:18:46,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 94. [2025-03-16 13:18:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2025-03-16 13:18:46,548 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 75 [2025-03-16 13:18:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:46,549 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2025-03-16 13:18:46,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2025-03-16 13:18:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-03-16 13:18:46,550 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:46,550 INFO L218 NwaCegarLoop]: trace histogram [46, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:46,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-16 13:18:46,551 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:46,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash 654541496, now seen corresponding path program 4 times [2025-03-16 13:18:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:46,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323478654] [2025-03-16 13:18:46,552 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:18:46,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:46,576 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 78 statements into 2 equivalence classes. [2025-03-16 13:18:46,609 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 78 of 78 statements. [2025-03-16 13:18:46,613 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:18:46,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 13:18:48,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:48,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323478654] [2025-03-16 13:18:48,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323478654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:48,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271602358] [2025-03-16 13:18:48,046 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:18:48,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:48,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:48,049 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 13:18:48,051 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 13:18:48,127 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 78 statements into 2 equivalence classes. [2025-03-16 13:18:48,184 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 78 of 78 statements. [2025-03-16 13:18:48,184 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:18:48,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:48,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:18:48,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:18:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2025-03-16 13:18:48,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:18:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2025-03-16 13:18:48,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271602358] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:18:48,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:18:48,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 13, 13] total 60 [2025-03-16 13:18:48,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362294321] [2025-03-16 13:18:48,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:18:48,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-03-16 13:18:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:18:48,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-03-16 13:18:48,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 13:18:48,605 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:49,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:18:49,177 INFO L93 Difference]: Finished difference Result 435 states and 677 transitions. [2025-03-16 13:18:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-16 13:18:49,177 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2025-03-16 13:18:49,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:18:49,179 INFO L225 Difference]: With dead ends: 435 [2025-03-16 13:18:49,179 INFO L226 Difference]: Without dead ends: 388 [2025-03-16 13:18:49,180 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 13:18:49,180 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 774 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:18:49,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 223 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:18:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2025-03-16 13:18:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 293. [2025-03-16 13:18:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.4006849315068493) internal successors, (409), 292 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 409 transitions. [2025-03-16 13:18:49,216 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 409 transitions. Word has length 78 [2025-03-16 13:18:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:18:49,216 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 409 transitions. [2025-03-16 13:18:49,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:18:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 409 transitions. [2025-03-16 13:18:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-03-16 13:18:49,218 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:18:49,218 INFO L218 NwaCegarLoop]: trace histogram [57, 56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:18:49,225 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 13:18:49,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:49,419 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:18:49,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:18:49,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1630090374, now seen corresponding path program 5 times [2025-03-16 13:18:49,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:18:49,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390224707] [2025-03-16 13:18:49,420 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:18:49,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:18:49,443 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 183 statements into 59 equivalence classes. [2025-03-16 13:18:49,752 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) and asserted 175 of 183 statements. [2025-03-16 13:18:49,752 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2025-03-16 13:18:49,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:18:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4904 backedges. 3140 proven. 109 refuted. 0 times theorem prover too weak. 1655 trivial. 0 not checked. [2025-03-16 13:18:52,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:18:52,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390224707] [2025-03-16 13:18:52,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390224707] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:18:52,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399114113] [2025-03-16 13:18:52,157 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:18:52,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:18:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:18:52,159 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 13:18:52,160 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 13:18:52,252 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 183 statements into 59 equivalence classes. [2025-03-16 13:20:07,755 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) and asserted 175 of 183 statements. [2025-03-16 13:20:07,755 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2025-03-16 13:20:07,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:20:07,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-03-16 13:20:07,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:20:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4904 backedges. 3140 proven. 109 refuted. 0 times theorem prover too weak. 1655 trivial. 0 not checked. [2025-03-16 13:20:08,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:20:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4904 backedges. 3194 proven. 55 refuted. 0 times theorem prover too weak. 1655 trivial. 0 not checked. [2025-03-16 13:20:09,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399114113] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:20:09,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:20:09,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 118 [2025-03-16 13:20:09,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916757731] [2025-03-16 13:20:09,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:20:09,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2025-03-16 13:20:09,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:20:09,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2025-03-16 13:20:09,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5781, Invalid=8025, Unknown=0, NotChecked=0, Total=13806 [2025-03-16 13:20:09,894 INFO L87 Difference]: Start difference. First operand 293 states and 409 transitions. Second operand has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 118 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:20:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:20:13,354 INFO L93 Difference]: Finished difference Result 578 states and 863 transitions. [2025-03-16 13:20:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2025-03-16 13:20:13,355 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 118 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2025-03-16 13:20:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:20:13,356 INFO L225 Difference]: With dead ends: 578 [2025-03-16 13:20:13,356 INFO L226 Difference]: Without dead ends: 353 [2025-03-16 13:20:13,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14276 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=25627, Invalid=39653, Unknown=0, NotChecked=0, Total=65280 [2025-03-16 13:20:13,370 INFO L435 NwaCegarLoop]: 119 mSDtfsCounter, 277 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 13:20:13,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 481 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 13:20:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2025-03-16 13:20:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2025-03-16 13:20:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3352272727272727) internal successors, (470), 352 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:20:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 470 transitions. [2025-03-16 13:20:13,444 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 470 transitions. Word has length 183 [2025-03-16 13:20:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:20:13,444 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 470 transitions. [2025-03-16 13:20:13,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 118 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:20:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 470 transitions. [2025-03-16 13:20:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2025-03-16 13:20:13,447 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:20:13,447 INFO L218 NwaCegarLoop]: trace histogram [58, 58, 58, 57, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:20:13,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 13:20:13,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:20:13,648 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:20:13,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:20:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash 306421794, now seen corresponding path program 6 times [2025-03-16 13:20:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:20:13,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73372596] [2025-03-16 13:20:13,649 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:20:13,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:20:13,678 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 351 statements into 98 equivalence classes. [2025-03-16 13:20:13,700 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 42 of 351 statements. [2025-03-16 13:20:13,700 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 13:20:13,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:20:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 5581 proven. 28 refuted. 0 times theorem prover too weak. 7387 trivial. 0 not checked. [2025-03-16 13:20:13,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:20:13,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73372596] [2025-03-16 13:20:13,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73372596] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:20:13,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970053741] [2025-03-16 13:20:13,777 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:20:13,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:20:13,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:20:13,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:20:13,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:20:13,908 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 351 statements into 98 equivalence classes. [2025-03-16 13:20:13,967 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 42 of 351 statements. [2025-03-16 13:20:13,968 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 13:20:13,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:20:13,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 13:20:13,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:20:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 5616 proven. 9 refuted. 0 times theorem prover too weak. 7371 trivial. 0 not checked. [2025-03-16 13:20:14,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:20:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 5617 proven. 8 refuted. 0 times theorem prover too weak. 7371 trivial. 0 not checked. [2025-03-16 13:20:14,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970053741] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:20:14,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:20:14,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2025-03-16 13:20:14,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821603502] [2025-03-16 13:20:14,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:20:14,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 13:20:14,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:20:14,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 13:20:14,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:20:14,049 INFO L87 Difference]: Start difference. First operand 353 states and 470 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:20:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:20:14,210 INFO L93 Difference]: Finished difference Result 796 states and 1131 transitions. [2025-03-16 13:20:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:20:14,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 351 [2025-03-16 13:20:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:20:14,213 INFO L225 Difference]: With dead ends: 796 [2025-03-16 13:20:14,213 INFO L226 Difference]: Without dead ends: 512 [2025-03-16 13:20:14,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 698 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:20:14,214 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:20:14,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 72 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:20:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2025-03-16 13:20:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2025-03-16 13:20:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.3346379647749511) internal successors, (682), 511 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:20:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 682 transitions. [2025-03-16 13:20:14,301 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 682 transitions. Word has length 351 [2025-03-16 13:20:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:20:14,301 INFO L471 AbstractCegarLoop]: Abstraction has 512 states and 682 transitions. [2025-03-16 13:20:14,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:20:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 682 transitions. [2025-03-16 13:20:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2025-03-16 13:20:14,306 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:20:14,306 INFO L218 NwaCegarLoop]: trace histogram [111, 111, 111, 57, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:20:14,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:20:14,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:20:14,510 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:20:14,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:20:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1322809986, now seen corresponding path program 7 times [2025-03-16 13:20:14,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:20:14,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987829789] [2025-03-16 13:20:14,511 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:20:14,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:20:14,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 510 statements into 1 equivalence classes. [2025-03-16 13:20:14,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 510 of 510 statements. [2025-03-16 13:20:14,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:20:14,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:20:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 29320 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 27667 trivial. 0 not checked. [2025-03-16 13:20:17,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:20:17,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987829789] [2025-03-16 13:20:17,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987829789] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:20:17,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350918887] [2025-03-16 13:20:17,238 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:20:17,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:20:17,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:20:17,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:20:17,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:20:17,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 510 statements into 1 equivalence classes. [2025-03-16 13:20:17,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 510 of 510 statements. [2025-03-16 13:20:17,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:20:17,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:20:17,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 2292 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-03-16 13:20:17,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:20:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 29320 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 27667 trivial. 0 not checked. [2025-03-16 13:20:17,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:20:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 29320 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 27667 trivial. 0 not checked. [2025-03-16 13:20:20,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350918887] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:20:20,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:20:20,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 117 [2025-03-16 13:20:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989156768] [2025-03-16 13:20:20,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:20:20,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2025-03-16 13:20:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:20:20,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2025-03-16 13:20:20,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2025-03-16 13:20:20,466 INFO L87 Difference]: Start difference. First operand 512 states and 682 transitions. Second operand has 118 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 117 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)