./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-19.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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/hardness-nfm22/hardness_operatoramount_amount250_file-19.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 19e2e876a884367ff58d4d1ec0d3ef70a7d8dd103d1be66ce3d8fde890972c6b --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 15:19:49,646 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 15:19:49,702 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 15:19:49,707 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 15:19:49,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 15:19:49,724 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 15:19:49,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 15:19:49,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 15:19:49,725 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 15:19:49,725 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 15:19:49,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 15:19:49,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 15:19:49,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 15:19:49,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 15:19:49,726 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 15:19:49,727 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 15:19:49,727 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 15:19:49,727 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 15:19:49,727 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 15:19:49,727 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 15:19:49,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 15:19:49,727 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 15:19:49,727 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 15:19:49,727 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 15:19:49,728 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 15:19:49,728 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 15:19:49,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 15:19:49,728 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 15:19:49,728 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 15:19:49,728 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 15:19:49,728 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 15:19:49,728 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 -> 19e2e876a884367ff58d4d1ec0d3ef70a7d8dd103d1be66ce3d8fde890972c6b [2025-03-08 15:19:49,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 15:19:49,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 15:19:49,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 15:19:49,952 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 15:19:49,952 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 15:19:49,953 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-19.i [2025-03-08 15:19:51,040 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ffe809d/e29473868d2d41349dbb4e0a750fdf9d/FLAG5898e59a5 [2025-03-08 15:19:51,287 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 15:19:51,288 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-19.i [2025-03-08 15:19:51,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ffe809d/e29473868d2d41349dbb4e0a750fdf9d/FLAG5898e59a5 [2025-03-08 15:19:51,600 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ffe809d/e29473868d2d41349dbb4e0a750fdf9d [2025-03-08 15:19:51,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 15:19:51,603 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 15:19:51,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 15:19:51,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 15:19:51,607 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 15:19:51,607 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:51,608 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c8e29a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51, skipping insertion in model container [2025-03-08 15:19:51,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:51,626 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 15:19:51,728 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/hardness-nfm22/hardness_operatoramount_amount250_file-19.i[916,929] [2025-03-08 15:19:51,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 15:19:51,852 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 15:19:51,858 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/hardness-nfm22/hardness_operatoramount_amount250_file-19.i[916,929] [2025-03-08 15:19:51,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 15:19:51,917 INFO L204 MainTranslator]: Completed translation [2025-03-08 15:19:51,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51 WrapperNode [2025-03-08 15:19:51,919 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 15:19:51,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 15:19:51,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 15:19:51,920 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 15:19:51,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:51,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:51,976 INFO L138 Inliner]: procedures = 26, calls = 58, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 374 [2025-03-08 15:19:51,977 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 15:19:51,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 15:19:51,977 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 15:19:51,978 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 15:19:51,983 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:51,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:51,990 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:52,014 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 15:19:52,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:52,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:52,028 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:52,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:52,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:52,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:52,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 15:19:52,041 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 15:19:52,041 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 15:19:52,041 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 15:19:52,041 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (1/1) ... [2025-03-08 15:19:52,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 15:19:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:19:52,069 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) [2025-03-08 15:19:52,072 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 [2025-03-08 15:19:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 15:19:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 15:19:52,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 15:19:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 15:19:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 15:19:52,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 15:19:52,188 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 15:19:52,189 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 15:19:52,750 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L367: havoc property_#t~ite33#1;havoc property_#t~bitwise32#1;havoc property_#t~short34#1; [2025-03-08 15:19:52,800 INFO L? ?]: Removed 48 outVars from TransFormulas that were not future-live. [2025-03-08 15:19:52,800 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 15:19:52,817 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 15:19:52,819 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 15:19:52,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 03:19:52 BoogieIcfgContainer [2025-03-08 15:19:52,820 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 15:19:52,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 15:19:52,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 15:19:52,825 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 15:19:52,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 03:19:51" (1/3) ... [2025-03-08 15:19:52,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73165294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 03:19:52, skipping insertion in model container [2025-03-08 15:19:52,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:19:51" (2/3) ... [2025-03-08 15:19:52,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73165294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 03:19:52, skipping insertion in model container [2025-03-08 15:19:52,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 03:19:52" (3/3) ... [2025-03-08 15:19:52,826 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-19.i [2025-03-08 15:19:52,836 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 15:19:52,837 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_operatoramount_amount250_file-19.i that has 2 procedures, 155 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-08 15:19:52,886 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 15:19:52,893 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;@21a0ed45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 15:19:52,894 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 15:19:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 107 states have (on average 1.514018691588785) internal successors, (162), 108 states have internal predecessors, (162), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2025-03-08 15:19:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2025-03-08 15:19:52,913 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:19:52,913 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:19:52,914 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:19:52,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:19:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1554179110, now seen corresponding path program 1 times [2025-03-08 15:19:52,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:19:52,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509142627] [2025-03-08 15:19:52,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:19:52,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:19:53,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 293 statements into 1 equivalence classes. [2025-03-08 15:19:53,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 293 of 293 statements. [2025-03-08 15:19:53,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:19:53,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:19:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2025-03-08 15:19:53,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:19:53,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509142627] [2025-03-08 15:19:53,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509142627] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:19:53,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904697305] [2025-03-08 15:19:53,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:19:53,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:19:53,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:19:53,339 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) [2025-03-08 15:19:53,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 15:19:53,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 293 statements into 1 equivalence classes. [2025-03-08 15:19:53,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 293 of 293 statements. [2025-03-08 15:19:53,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:19:53,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:19:53,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 15:19:53,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:19:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2025-03-08 15:19:53,590 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 15:19:53,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904697305] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:19:53,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 15:19:53,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 15:19:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040163454] [2025-03-08 15:19:53,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:19:53,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 15:19:53,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:19:53,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 15:19:53,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 15:19:53,610 INFO L87 Difference]: Start difference. First operand has 155 states, 107 states have (on average 1.514018691588785) internal successors, (162), 108 states have internal predecessors, (162), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2025-03-08 15:19:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:19:53,639 INFO L93 Difference]: Finished difference Result 303 states and 542 transitions. [2025-03-08 15:19:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 15:19:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) Word has length 293 [2025-03-08 15:19:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:19:53,646 INFO L225 Difference]: With dead ends: 303 [2025-03-08 15:19:53,647 INFO L226 Difference]: Without dead ends: 151 [2025-03-08 15:19:53,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 15:19:53,651 INFO L435 NwaCegarLoop]: 242 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 15:19:53,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 242 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 15:19:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2025-03-08 15:19:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2025-03-08 15:19:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 104 states have (on average 1.4807692307692308) internal successors, (154), 104 states have internal predecessors, (154), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2025-03-08 15:19:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 244 transitions. [2025-03-08 15:19:53,692 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 244 transitions. Word has length 293 [2025-03-08 15:19:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:19:53,693 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 244 transitions. [2025-03-08 15:19:53,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2025-03-08 15:19:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 244 transitions. [2025-03-08 15:19:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2025-03-08 15:19:53,699 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:19:53,700 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:19:53,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 15:19:53,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-08 15:19:53,904 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:19:53,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:19:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1657974608, now seen corresponding path program 1 times [2025-03-08 15:19:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:19:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338819683] [2025-03-08 15:19:53,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:19:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:19:53,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 293 statements into 1 equivalence classes. [2025-03-08 15:19:54,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 293 of 293 statements. [2025-03-08 15:19:54,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:19:54,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:19:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2025-03-08 15:19:54,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:19:54,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338819683] [2025-03-08 15:19:54,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338819683] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:19:54,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 15:19:54,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 15:19:54,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909681424] [2025-03-08 15:19:54,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:19:54,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 15:19:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:19:54,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 15:19:54,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 15:19:54,203 INFO L87 Difference]: Start difference. First operand 151 states and 244 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2025-03-08 15:19:54,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:19:54,326 INFO L93 Difference]: Finished difference Result 368 states and 594 transitions. [2025-03-08 15:19:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 15:19:54,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 293 [2025-03-08 15:19:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:19:54,329 INFO L225 Difference]: With dead ends: 368 [2025-03-08 15:19:54,331 INFO L226 Difference]: Without dead ends: 220 [2025-03-08 15:19:54,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 15:19:54,333 INFO L435 NwaCegarLoop]: 276 mSDtfsCounter, 102 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 15:19:54,334 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 499 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 15:19:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-03-08 15:19:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2025-03-08 15:19:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 155 states have (on average 1.4838709677419355) internal successors, (230), 156 states have internal predecessors, (230), 59 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2025-03-08 15:19:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 348 transitions. [2025-03-08 15:19:54,363 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 348 transitions. Word has length 293 [2025-03-08 15:19:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:19:54,365 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 348 transitions. [2025-03-08 15:19:54,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2025-03-08 15:19:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 348 transitions. [2025-03-08 15:19:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2025-03-08 15:19:54,368 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:19:54,368 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:19:54,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 15:19:54,368 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:19:54,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:19:54,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1302348261, now seen corresponding path program 1 times [2025-03-08 15:19:54,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:19:54,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867169540] [2025-03-08 15:19:54,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:19:54,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:19:54,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 294 statements into 1 equivalence classes. [2025-03-08 15:19:54,664 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 294 of 294 statements. [2025-03-08 15:19:54,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:19:54,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:19:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2025-03-08 15:19:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:19:55,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867169540] [2025-03-08 15:19:55,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867169540] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:19:55,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 15:19:55,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 15:19:55,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832630335] [2025-03-08 15:19:55,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:19:55,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 15:19:55,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:19:55,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 15:19:55,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 15:19:55,748 INFO L87 Difference]: Start difference. First operand 217 states and 348 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2025-03-08 15:19:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:19:56,198 INFO L93 Difference]: Finished difference Result 981 states and 1569 transitions. [2025-03-08 15:19:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 15:19:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 294 [2025-03-08 15:19:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:19:56,206 INFO L225 Difference]: With dead ends: 981 [2025-03-08 15:19:56,206 INFO L226 Difference]: Without dead ends: 767 [2025-03-08 15:19:56,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-03-08 15:19:56,207 INFO L435 NwaCegarLoop]: 257 mSDtfsCounter, 735 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 15:19:56,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 751 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 15:19:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2025-03-08 15:19:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 367. [2025-03-08 15:19:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 283 states have (on average 1.519434628975265) internal successors, (430), 286 states have internal predecessors, (430), 79 states have call successors, (79), 4 states have call predecessors, (79), 4 states have return successors, (79), 76 states have call predecessors, (79), 79 states have call successors, (79) [2025-03-08 15:19:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 588 transitions. [2025-03-08 15:19:56,253 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 588 transitions. Word has length 294 [2025-03-08 15:19:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:19:56,254 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 588 transitions. [2025-03-08 15:19:56,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2025-03-08 15:19:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 588 transitions. [2025-03-08 15:19:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2025-03-08 15:19:56,256 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:19:56,256 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:19:56,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 15:19:56,257 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:19:56,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:19:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash 509056453, now seen corresponding path program 1 times [2025-03-08 15:19:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:19:56,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523149661] [2025-03-08 15:19:56,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:19:56,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:19:56,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 294 statements into 1 equivalence classes. [2025-03-08 15:19:56,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 294 of 294 statements. [2025-03-08 15:19:56,615 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:19:56,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:19:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 81 proven. 51 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2025-03-08 15:19:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:19:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523149661] [2025-03-08 15:19:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523149661] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:19:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42820993] [2025-03-08 15:19:57,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:19:57,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:19:57,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:19:57,436 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) [2025-03-08 15:19:57,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 15:19:57,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 294 statements into 1 equivalence classes. [2025-03-08 15:19:57,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 294 of 294 statements. [2025-03-08 15:19:57,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:19:57,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:19:57,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 15:19:57,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:19:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1658 proven. 66 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2025-03-08 15:19:59,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:20:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 192 proven. 69 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2025-03-08 15:20:00,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42820993] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 15:20:00,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 15:20:00,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14] total 33 [2025-03-08 15:20:00,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951732631] [2025-03-08 15:20:00,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 15:20:00,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 15:20:00,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:20:00,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 15:20:00,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 15:20:00,538 INFO L87 Difference]: Start difference. First operand 367 states and 588 transitions. Second operand has 33 states, 31 states have (on average 6.806451612903226) internal successors, (211), 30 states have internal predecessors, (211), 10 states have call successors, (135), 4 states have call predecessors, (135), 8 states have return successors, (135), 10 states have call predecessors, (135), 10 states have call successors, (135) [2025-03-08 15:20:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:20:19,599 INFO L93 Difference]: Finished difference Result 11784 states and 18068 transitions. [2025-03-08 15:20:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2025-03-08 15:20:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 6.806451612903226) internal successors, (211), 30 states have internal predecessors, (211), 10 states have call successors, (135), 4 states have call predecessors, (135), 8 states have return successors, (135), 10 states have call predecessors, (135), 10 states have call successors, (135) Word has length 294 [2025-03-08 15:20:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:20:19,649 INFO L225 Difference]: With dead ends: 11784 [2025-03-08 15:20:19,649 INFO L226 Difference]: Without dead ends: 11420 [2025-03-08 15:20:19,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39397 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=13629, Invalid=72513, Unknown=0, NotChecked=0, Total=86142 [2025-03-08 15:20:19,667 INFO L435 NwaCegarLoop]: 459 mSDtfsCounter, 11866 mSDsluCounter, 6661 mSDsCounter, 0 mSdLazyCounter, 7562 mSolverCounterSat, 4737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11997 SdHoareTripleChecker+Valid, 7120 SdHoareTripleChecker+Invalid, 12299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4737 IncrementalHoareTripleChecker+Valid, 7562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2025-03-08 15:20:19,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11997 Valid, 7120 Invalid, 12299 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4737 Valid, 7562 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2025-03-08 15:20:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11420 states. [2025-03-08 15:20:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11420 to 4736. [2025-03-08 15:20:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4736 states, 3671 states have (on average 1.4677199673113592) internal successors, (5388), 3735 states have internal predecessors, (5388), 973 states have call successors, (973), 91 states have call predecessors, (973), 91 states have return successors, (973), 909 states have call predecessors, (973), 973 states have call successors, (973) [2025-03-08 15:20:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4736 states to 4736 states and 7334 transitions. [2025-03-08 15:20:20,175 INFO L78 Accepts]: Start accepts. Automaton has 4736 states and 7334 transitions. Word has length 294 [2025-03-08 15:20:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:20:20,176 INFO L471 AbstractCegarLoop]: Abstraction has 4736 states and 7334 transitions. [2025-03-08 15:20:20,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 6.806451612903226) internal successors, (211), 30 states have internal predecessors, (211), 10 states have call successors, (135), 4 states have call predecessors, (135), 8 states have return successors, (135), 10 states have call predecessors, (135), 10 states have call successors, (135) [2025-03-08 15:20:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4736 states and 7334 transitions. [2025-03-08 15:20:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2025-03-08 15:20:20,181 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:20:20,181 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:20:20,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 15:20:20,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 15:20:20,382 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:20:20,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:20:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1081879632, now seen corresponding path program 1 times [2025-03-08 15:20:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:20:20,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608822360] [2025-03-08 15:20:20,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:20:20,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:20:20,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 294 statements into 1 equivalence classes. [2025-03-08 15:20:20,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 294 of 294 statements. [2025-03-08 15:20:20,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:20:20,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:20:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2025-03-08 15:20:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:20:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608822360] [2025-03-08 15:20:20,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608822360] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:20:20,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 15:20:20,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 15:20:20,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152124782] [2025-03-08 15:20:20,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:20:20,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 15:20:20,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:20:20,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 15:20:20,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 15:20:20,512 INFO L87 Difference]: Start difference. First operand 4736 states and 7334 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2025-03-08 15:20:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:20:21,051 INFO L93 Difference]: Finished difference Result 10194 states and 15769 transitions. [2025-03-08 15:20:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 15:20:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 294 [2025-03-08 15:20:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:20:21,081 INFO L225 Difference]: With dead ends: 10194 [2025-03-08 15:20:21,083 INFO L226 Difference]: Without dead ends: 6560 [2025-03-08 15:20:21,095 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 15:20:21,096 INFO L435 NwaCegarLoop]: 263 mSDtfsCounter, 106 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 15:20:21,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 482 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 15:20:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6560 states. [2025-03-08 15:20:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6560 to 5286. [2025-03-08 15:20:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5286 states, 4220 states have (on average 1.4898104265402843) internal successors, (6287), 4284 states have internal predecessors, (6287), 973 states have call successors, (973), 92 states have call predecessors, (973), 92 states have return successors, (973), 909 states have call predecessors, (973), 973 states have call successors, (973) [2025-03-08 15:20:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5286 states to 5286 states and 8233 transitions. [2025-03-08 15:20:21,584 INFO L78 Accepts]: Start accepts. Automaton has 5286 states and 8233 transitions. Word has length 294 [2025-03-08 15:20:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:20:21,585 INFO L471 AbstractCegarLoop]: Abstraction has 5286 states and 8233 transitions. [2025-03-08 15:20:21,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2025-03-08 15:20:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5286 states and 8233 transitions. [2025-03-08 15:20:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2025-03-08 15:20:21,591 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:20:21,591 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:20:21,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 15:20:21,591 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:20:21,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:20:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash -194375951, now seen corresponding path program 1 times [2025-03-08 15:20:21,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:20:21,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512006468] [2025-03-08 15:20:21,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:20:21,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:20:21,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 294 statements into 1 equivalence classes. [2025-03-08 15:20:21,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 294 of 294 statements. [2025-03-08 15:20:21,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:20:21,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:20:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 42 proven. 90 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2025-03-08 15:20:22,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:20:22,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512006468] [2025-03-08 15:20:22,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512006468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:20:22,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116402164] [2025-03-08 15:20:22,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:20:22,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:20:22,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:20:22,041 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) [2025-03-08 15:20:22,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 15:20:22,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 294 statements into 1 equivalence classes. [2025-03-08 15:20:22,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 294 of 294 statements. [2025-03-08 15:20:22,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:20:22,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:20:22,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 15:20:22,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:20:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1752 proven. 90 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2025-03-08 15:20:22,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:20:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 42 proven. 90 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2025-03-08 15:20:22,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116402164] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 15:20:22,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 15:20:22,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2025-03-08 15:20:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667338951] [2025-03-08 15:20:22,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 15:20:22,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 15:20:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:20:22,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 15:20:22,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-08 15:20:22,758 INFO L87 Difference]: Start difference. First operand 5286 states and 8233 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2025-03-08 15:20:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:20:23,328 INFO L93 Difference]: Finished difference Result 9022 states and 13845 transitions. [2025-03-08 15:20:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 15:20:23,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) Word has length 294 [2025-03-08 15:20:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:20:23,349 INFO L225 Difference]: With dead ends: 9022 [2025-03-08 15:20:23,349 INFO L226 Difference]: Without dead ends: 4900 [2025-03-08 15:20:23,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 585 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2025-03-08 15:20:23,359 INFO L435 NwaCegarLoop]: 204 mSDtfsCounter, 205 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 15:20:23,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 500 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 15:20:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4900 states. [2025-03-08 15:20:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4900 to 4678. [2025-03-08 15:20:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 3599 states have (on average 1.4231731036399) internal successors, (5122), 3663 states have internal predecessors, (5122), 973 states have call successors, (973), 105 states have call predecessors, (973), 105 states have return successors, (973), 909 states have call predecessors, (973), 973 states have call successors, (973) [2025-03-08 15:20:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 7068 transitions. [2025-03-08 15:20:23,739 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 7068 transitions. Word has length 294 [2025-03-08 15:20:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:20:23,739 INFO L471 AbstractCegarLoop]: Abstraction has 4678 states and 7068 transitions. [2025-03-08 15:20:23,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 2 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2025-03-08 15:20:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 7068 transitions. [2025-03-08 15:20:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2025-03-08 15:20:23,744 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:20:23,744 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 15:20:23,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 15:20:23,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:20:23,945 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:20:23,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:20:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1941134343, now seen corresponding path program 1 times [2025-03-08 15:20:23,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:20:23,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18104384] [2025-03-08 15:20:23,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:20:23,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:20:23,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 294 statements into 1 equivalence classes. [2025-03-08 15:20:24,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 294 of 294 statements. [2025-03-08 15:20:24,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:20:24,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:20:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 156 proven. 222 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2025-03-08 15:20:25,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:20:25,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18104384] [2025-03-08 15:20:25,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18104384] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:20:25,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067979297] [2025-03-08 15:20:25,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:20:25,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:20:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:20:25,455 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) [2025-03-08 15:20:25,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 15:20:25,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 294 statements into 1 equivalence classes. [2025-03-08 15:20:25,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 294 of 294 statements. [2025-03-08 15:20:25,644 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:20:25,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:20:25,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-08 15:20:25,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:20:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2284 proven. 615 refuted. 0 times theorem prover too weak. 1061 trivial. 0 not checked. [2025-03-08 15:20:28,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:20:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 177 proven. 570 refuted. 0 times theorem prover too weak. 3213 trivial. 0 not checked. [2025-03-08 15:20:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067979297] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 15:20:31,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 15:20:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 26, 25] total 57 [2025-03-08 15:20:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286712854] [2025-03-08 15:20:31,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 15:20:31,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-08 15:20:31,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:20:31,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-08 15:20:31,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=2456, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 15:20:31,819 INFO L87 Difference]: Start difference. First operand 4678 states and 7068 transitions. Second operand has 57 states, 53 states have (on average 4.113207547169812) internal successors, (218), 51 states have internal predecessors, (218), 19 states have call successors, (135), 9 states have call predecessors, (135), 19 states have return successors, (135), 19 states have call predecessors, (135), 19 states have call successors, (135) [2025-03-08 15:20:49,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 15:20:51,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []