./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_15-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_15-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06a81e8bf3973396767cf6326af5dc9a5105a737c418064bf310f9765cc117f7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:32:53,593 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:32:53,640 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:32:53,644 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:32:53,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:32:53,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:32:53,667 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:32:53,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:32:53,667 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:32:53,668 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:32:53,668 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:32:53,668 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:32:53,668 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:32:53,668 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:32:53,668 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:32:53,669 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:32:53,669 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:32:53,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:32:53,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:32:53,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:32:53,670 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:32:53,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:32:53,670 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:32:53,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:32:53,670 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:32:53,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:32:53,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:32:53,671 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:32:53,671 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 -> 06a81e8bf3973396767cf6326af5dc9a5105a737c418064bf310f9765cc117f7 [2025-03-03 14:32:53,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:32:53,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:32:53,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:32:53,901 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:32:53,901 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:32:53,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_15-1.c [2025-03-03 14:32:55,012 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbf679cee/f9212b65e6f644e69086ab41f770d58b/FLAG76b7d274e [2025-03-03 14:32:55,240 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:32:55,240 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_15-1.c [2025-03-03 14:32:55,245 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbf679cee/f9212b65e6f644e69086ab41f770d58b/FLAG76b7d274e [2025-03-03 14:32:55,573 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbf679cee/f9212b65e6f644e69086ab41f770d58b [2025-03-03 14:32:55,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:32:55,575 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:32:55,576 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:32:55,576 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:32:55,579 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:32:55,579 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c1f68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55, skipping insertion in model container [2025-03-03 14:32:55,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,589 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:32:55,680 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/recursive-simple/fibo_15-1.c[744,757] [2025-03-03 14:32:55,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:32:55,690 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:32:55,698 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/recursive-simple/fibo_15-1.c[744,757] [2025-03-03 14:32:55,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:32:55,708 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:32:55,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55 WrapperNode [2025-03-03 14:32:55,710 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:32:55,711 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:32:55,711 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:32:55,711 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:32:55,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,729 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:32:55,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:32:55,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:32:55,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:32:55,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:32:55,735 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,736 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,743 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 14:32:55,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,745 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,745 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,750 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:32:55,751 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:32:55,751 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:32:55,751 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:32:55,752 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:32:55,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:55,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 14:32:55,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 14:32:55,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:32:55,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:32:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:32:55,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:32:55,798 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-03-03 14:32:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-03-03 14:32:55,836 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:32:55,837 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:32:55,907 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:32:55,915 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 14:32:55,916 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:32:55,922 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:32:55,923 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:32:55,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:32:55 BoogieIcfgContainer [2025-03-03 14:32:55,924 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:32:55,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:32:55,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:32:55,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:32:55,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:32:55" (1/3) ... [2025-03-03 14:32:55,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ab26fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:32:55, skipping insertion in model container [2025-03-03 14:32:55,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (2/3) ... [2025-03-03 14:32:55,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ab26fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:32:55, skipping insertion in model container [2025-03-03 14:32:55,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:32:55" (3/3) ... [2025-03-03 14:32:55,933 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_15-1.c [2025-03-03 14:32:55,944 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:32:55,946 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_15-1.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:32:55,986 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:32:55,996 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;@10e93790, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:32:55,997 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:32:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 14:32:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:32:56,005 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:56,005 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:56,005 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:56,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash 402921910, now seen corresponding path program 1 times [2025-03-03 14:32:56,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:56,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907401205] [2025-03-03 14:32:56,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:56,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:32:56,075 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:32:56,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:56,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:32:56,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:56,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907401205] [2025-03-03 14:32:56,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907401205] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:32:56,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:32:56,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:32:56,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852294295] [2025-03-03 14:32:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:32:56,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:32:56,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:56,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:32:56,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:56,184 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:32:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:56,238 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-03-03 14:32:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:32:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-03 14:32:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:56,244 INFO L225 Difference]: With dead ends: 32 [2025-03-03 14:32:56,245 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:32:56,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:56,248 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:56,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:32:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-03 14:32:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-03 14:32:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 14:32:56,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2025-03-03 14:32:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:56,273 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 14:32:56,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:32:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 14:32:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:32:56,274 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:56,274 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:56,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:32:56,274 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:56,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:56,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2143228819, now seen corresponding path program 1 times [2025-03-03 14:32:56,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:56,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674786789] [2025-03-03 14:32:56,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:56,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:56,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:32:56,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:32:56,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:56,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:32:56,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:56,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674786789] [2025-03-03 14:32:56,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674786789] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:32:56,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:32:56,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:32:56,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178788508] [2025-03-03 14:32:56,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:32:56,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:32:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:56,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:32:56,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:56,342 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:32:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:56,382 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-03-03 14:32:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:32:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-03 14:32:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:56,383 INFO L225 Difference]: With dead ends: 24 [2025-03-03 14:32:56,383 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:32:56,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:56,383 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:56,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:32:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-03 14:32:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-03 14:32:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 14:32:56,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2025-03-03 14:32:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:56,387 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 14:32:56,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:32:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 14:32:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:32:56,388 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:56,388 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:56,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:32:56,388 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:56,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1857137997, now seen corresponding path program 1 times [2025-03-03 14:32:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:56,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238242113] [2025-03-03 14:32:56,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:56,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:32:56,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:32:56,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:56,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:32:56,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238242113] [2025-03-03 14:32:56,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238242113] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108379305] [2025-03-03 14:32:56,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:56,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:56,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:56,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:56,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:32:56,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:32:56,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:32:56,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:56,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:56,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:32:56,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:32:56,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 14:32:56,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108379305] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:56,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:56,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-03-03 14:32:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708144099] [2025-03-03 14:32:56,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:56,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:32:56,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:56,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:32:56,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:32:56,758 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:32:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:56,831 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-03-03 14:32:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:32:56,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-03 14:32:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:56,832 INFO L225 Difference]: With dead ends: 35 [2025-03-03 14:32:56,833 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:32:56,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-03-03 14:32:56,834 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:56,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:32:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:32:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-03 14:32:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-03 14:32:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-03-03 14:32:56,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2025-03-03 14:32:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:56,838 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-03-03 14:32:56,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:32:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-03-03 14:32:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:32:56,839 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:56,839 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:56,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 14:32:57,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:57,043 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:57,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash -318077138, now seen corresponding path program 1 times [2025-03-03 14:32:57,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:57,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749190975] [2025-03-03 14:32:57,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:57,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:57,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:32:57,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:32:57,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:57,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:32:57,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:57,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749190975] [2025-03-03 14:32:57,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749190975] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:57,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114403097] [2025-03-03 14:32:57,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:57,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:57,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:57,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:57,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:32:57,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:32:57,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:32:57,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:57,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:57,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:32:57,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:32:57,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 14:32:57,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114403097] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:57,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:57,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-03-03 14:32:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198202199] [2025-03-03 14:32:57,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:57,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 14:32:57,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:57,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 14:32:57,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-03 14:32:57,328 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:32:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:57,385 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-03-03 14:32:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 14:32:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-03 14:32:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:57,387 INFO L225 Difference]: With dead ends: 29 [2025-03-03 14:32:57,388 INFO L226 Difference]: Without dead ends: 25 [2025-03-03 14:32:57,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:32:57,389 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:57,390 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-03 14:32:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-03 14:32:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 14:32:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-03-03 14:32:57,397 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2025-03-03 14:32:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:57,397 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-03-03 14:32:57,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:32:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-03-03 14:32:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:32:57,400 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:57,400 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:57,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:57,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 14:32:57,602 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:57,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash -896080901, now seen corresponding path program 2 times [2025-03-03 14:32:57,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:57,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310294987] [2025-03-03 14:32:57,603 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:57,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:57,609 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 14:32:57,621 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:32:57,621 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:57,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 14:32:57,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:57,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310294987] [2025-03-03 14:32:57,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310294987] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:57,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226619538] [2025-03-03 14:32:57,760 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:57,762 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:57,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:32:57,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 14:32:57,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:32:57,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:57,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:57,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:32:57,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 14:32:57,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 14:32:58,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226619538] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:58,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:58,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2025-03-03 14:32:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026642484] [2025-03-03 14:32:58,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:58,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:32:58,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:58,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:32:58,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:32:58,171 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-03 14:32:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:58,345 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2025-03-03 14:32:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:32:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2025-03-03 14:32:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:58,346 INFO L225 Difference]: With dead ends: 60 [2025-03-03 14:32:58,346 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:32:58,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:32:58,347 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:58,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:32:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:32:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-03-03 14:32:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-03 14:32:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2025-03-03 14:32:58,352 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2025-03-03 14:32:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:58,352 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2025-03-03 14:32:58,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-03 14:32:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2025-03-03 14:32:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-03 14:32:58,354 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:58,354 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:58,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:58,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:58,558 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:58,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1467785241, now seen corresponding path program 3 times [2025-03-03 14:32:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310452362] [2025-03-03 14:32:58,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:32:58,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:58,565 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-03 14:32:58,581 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-03 14:32:58,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:32:58,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-03 14:32:58,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:58,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310452362] [2025-03-03 14:32:58,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310452362] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:58,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508769793] [2025-03-03 14:32:58,669 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:32:58,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:58,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:58,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:58,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 14:32:58,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-03 14:32:58,710 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-03 14:32:58,710 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:32:58,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:58,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:32:58,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-03 14:32:58,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-03 14:32:59,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508769793] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:59,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:59,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-03-03 14:32:59,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423003538] [2025-03-03 14:32:59,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:59,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:32:59,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:59,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:32:59,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:32:59,060 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 14:32:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:59,150 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2025-03-03 14:32:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:32:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2025-03-03 14:32:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:59,151 INFO L225 Difference]: With dead ends: 72 [2025-03-03 14:32:59,151 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 14:32:59,152 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:32:59,152 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:59,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:32:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 14:32:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-03 14:32:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-03 14:32:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-03-03 14:32:59,158 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 93 [2025-03-03 14:32:59,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:59,158 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-03-03 14:32:59,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 14:32:59,159 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-03-03 14:32:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 14:32:59,159 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:59,160 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:59,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:59,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:59,360 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:59,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:59,361 INFO L85 PathProgramCache]: Analyzing trace with hash 152396661, now seen corresponding path program 4 times [2025-03-03 14:32:59,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:59,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038663298] [2025-03-03 14:32:59,361 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:32:59,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:59,365 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-03 14:32:59,370 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 14:32:59,371 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:32:59,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 96 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 14:32:59,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:59,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038663298] [2025-03-03 14:32:59,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038663298] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:59,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19017852] [2025-03-03 14:32:59,504 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:32:59,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:59,506 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:32:59,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 14:32:59,535 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-03 14:32:59,553 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 14:32:59,554 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:32:59,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:59,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:32:59,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 14:32:59,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 14:32:59,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19017852] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:59,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:59,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2025-03-03 14:33:00,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716545537] [2025-03-03 14:33:00,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:00,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:00,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:00,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:00,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:00,001 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-03-03 14:33:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:00,165 INFO L93 Difference]: Finished difference Result 89 states and 122 transitions. [2025-03-03 14:33:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:33:00,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) Word has length 65 [2025-03-03 14:33:00,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:00,168 INFO L225 Difference]: With dead ends: 89 [2025-03-03 14:33:00,170 INFO L226 Difference]: Without dead ends: 85 [2025-03-03 14:33:00,170 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:00,171 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:00,171 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 97 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-03 14:33:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2025-03-03 14:33:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 51 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (34), 19 states have call predecessors, (34), 14 states have call successors, (34) [2025-03-03 14:33:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 108 transitions. [2025-03-03 14:33:00,188 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 108 transitions. Word has length 65 [2025-03-03 14:33:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:00,188 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 108 transitions. [2025-03-03 14:33:00,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-03-03 14:33:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 108 transitions. [2025-03-03 14:33:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2025-03-03 14:33:00,192 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:00,192 INFO L218 NwaCegarLoop]: trace histogram [39, 39, 31, 19, 19, 19, 19, 19, 19, 19, 12, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:00,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 14:33:00,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:00,396 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:00,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1241057303, now seen corresponding path program 5 times [2025-03-03 14:33:00,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:00,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622245553] [2025-03-03 14:33:00,396 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:00,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:00,405 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 269 statements into 30 equivalence classes. [2025-03-03 14:33:00,436 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 190 of 269 statements. [2025-03-03 14:33:00,436 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-03 14:33:00,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 409 proven. 906 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2025-03-03 14:33:00,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:00,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622245553] [2025-03-03 14:33:00,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622245553] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:00,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133744777] [2025-03-03 14:33:00,743 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:00,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:00,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:00,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:00,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 14:33:00,791 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 269 statements into 30 equivalence classes. [2025-03-03 14:33:00,834 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 190 of 269 statements. [2025-03-03 14:33:00,834 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-03 14:33:00,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:00,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:33:00,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 2372 proven. 241 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2025-03-03 14:33:00,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 413 proven. 1025 refuted. 0 times theorem prover too weak. 2675 trivial. 0 not checked. [2025-03-03 14:33:02,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133744777] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:02,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:02,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 17] total 24 [2025-03-03 14:33:02,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098008470] [2025-03-03 14:33:02,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:02,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:33:02,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:02,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:33:02,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:33:02,127 INFO L87 Difference]: Start difference. First operand 79 states and 108 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-03 14:33:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:02,367 INFO L93 Difference]: Finished difference Result 185 states and 289 transitions. [2025-03-03 14:33:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 14:33:02,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) Word has length 269 [2025-03-03 14:33:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:02,369 INFO L225 Difference]: With dead ends: 185 [2025-03-03 14:33:02,369 INFO L226 Difference]: Without dead ends: 84 [2025-03-03 14:33:02,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 525 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:33:02,371 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:02,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 119 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-03 14:33:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2025-03-03 14:33:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (33), 17 states have call predecessors, (33), 13 states have call successors, (33) [2025-03-03 14:33:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2025-03-03 14:33:02,379 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 269 [2025-03-03 14:33:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:02,379 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2025-03-03 14:33:02,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-03 14:33:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2025-03-03 14:33:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2025-03-03 14:33:02,381 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:02,381 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:02,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 14:33:02,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:02,595 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:02,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash -555793953, now seen corresponding path program 6 times [2025-03-03 14:33:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:02,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967418875] [2025-03-03 14:33:02,595 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:02,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:02,602 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 215 statements into 28 equivalence classes. [2025-03-03 14:33:02,622 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 125 of 215 statements. [2025-03-03 14:33:02,622 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-03 14:33:02,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 241 proven. 445 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2025-03-03 14:33:02,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967418875] [2025-03-03 14:33:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967418875] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866514720] [2025-03-03 14:33:02,779 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:02,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:02,781 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:02,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:33:02,827 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 215 statements into 28 equivalence classes. [2025-03-03 14:33:02,854 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 125 of 215 statements. [2025-03-03 14:33:02,854 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-03 14:33:02,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:02,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:33:02,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 241 proven. 445 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2025-03-03 14:33:02,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 243 proven. 467 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2025-03-03 14:33:03,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866514720] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:03,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:03,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2025-03-03 14:33:03,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848031285] [2025-03-03 14:33:03,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:03,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 14:33:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:03,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 14:33:03,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-03-03 14:33:03,639 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-03 14:33:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:03,720 INFO L93 Difference]: Finished difference Result 93 states and 133 transitions. [2025-03-03 14:33:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:33:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 215 [2025-03-03 14:33:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:03,723 INFO L225 Difference]: With dead ends: 93 [2025-03-03 14:33:03,725 INFO L226 Difference]: Without dead ends: 89 [2025-03-03 14:33:03,725 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 423 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:33:03,726 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:03,726 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 86 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-03 14:33:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2025-03-03 14:33:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 54 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (36), 18 states have call predecessors, (36), 13 states have call successors, (36) [2025-03-03 14:33:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2025-03-03 14:33:03,741 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 215 [2025-03-03 14:33:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:03,742 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2025-03-03 14:33:03,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-03 14:33:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2025-03-03 14:33:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2025-03-03 14:33:03,745 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:03,745 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:03,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:03,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:03,950 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:03,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2062059334, now seen corresponding path program 7 times [2025-03-03 14:33:03,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:03,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263695843] [2025-03-03 14:33:03,950 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:03,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:03,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 284 statements into 1 equivalence classes. [2025-03-03 14:33:03,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 284 of 284 statements. [2025-03-03 14:33:03,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:03,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 990 refuted. 0 times theorem prover too weak. 3443 trivial. 0 not checked. [2025-03-03 14:33:04,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263695843] [2025-03-03 14:33:04,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263695843] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613499922] [2025-03-03 14:33:04,203 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:04,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:04,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:04,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:04,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:33:04,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 284 statements into 1 equivalence classes. [2025-03-03 14:33:04,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 284 of 284 statements. [2025-03-03 14:33:04,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:04,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:04,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:33:04,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 990 refuted. 0 times theorem prover too weak. 3443 trivial. 0 not checked. [2025-03-03 14:33:04,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 1030 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2025-03-03 14:33:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613499922] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:05,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:05,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2025-03-03 14:33:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379563825] [2025-03-03 14:33:05,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:05,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:05,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:05,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:05,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:05,419 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-03-03 14:33:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:05,518 INFO L93 Difference]: Finished difference Result 95 states and 144 transitions. [2025-03-03 14:33:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:33:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 284 [2025-03-03 14:33:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:05,520 INFO L225 Difference]: With dead ends: 95 [2025-03-03 14:33:05,520 INFO L226 Difference]: Without dead ends: 91 [2025-03-03 14:33:05,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 560 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:05,521 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:05,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 76 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-03 14:33:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2025-03-03 14:33:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 55 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 11 states have return successors, (43), 19 states have call predecessors, (43), 14 states have call successors, (43) [2025-03-03 14:33:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2025-03-03 14:33:05,529 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 284 [2025-03-03 14:33:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:05,530 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2025-03-03 14:33:05,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-03-03 14:33:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2025-03-03 14:33:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2025-03-03 14:33:05,544 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:05,544 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 36, 22, 22, 22, 22, 22, 22, 22, 14, 9, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:05,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 14:33:05,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 14:33:05,744 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:05,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:05,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1474401376, now seen corresponding path program 8 times [2025-03-03 14:33:05,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:05,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061479155] [2025-03-03 14:33:05,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:05,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:05,752 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 310 statements into 2 equivalence classes. [2025-03-03 14:33:05,773 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 310 of 310 statements. [2025-03-03 14:33:05,774 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:05,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2025-03-03 14:33:06,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:06,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061479155] [2025-03-03 14:33:06,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061479155] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:06,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612048462] [2025-03-03 14:33:06,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:06,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:06,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:06,048 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:06,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 14:33:06,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 310 statements into 2 equivalence classes. [2025-03-03 14:33:06,164 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 310 of 310 statements. [2025-03-03 14:33:06,164 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:06,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:06,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:33:06,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2025-03-03 14:33:06,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1316 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2025-03-03 14:33:07,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612048462] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:07,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:07,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2025-03-03 14:33:07,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063180640] [2025-03-03 14:33:07,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:07,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 14:33:07,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:07,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 14:33:07,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:33:07,723 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-03-03 14:33:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:07,847 INFO L93 Difference]: Finished difference Result 92 states and 137 transitions. [2025-03-03 14:33:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:33:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 310 [2025-03-03 14:33:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:07,849 INFO L225 Difference]: With dead ends: 92 [2025-03-03 14:33:07,850 INFO L226 Difference]: Without dead ends: 88 [2025-03-03 14:33:07,850 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 611 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:33:07,850 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:07,851 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 89 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-03 14:33:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2025-03-03 14:33:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.05) internal successors, (63), 58 states have internal predecessors, (63), 15 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (55), 21 states have call predecessors, (55), 15 states have call successors, (55) [2025-03-03 14:33:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2025-03-03 14:33:07,864 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 310 [2025-03-03 14:33:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:07,865 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2025-03-03 14:33:07,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-03-03 14:33:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2025-03-03 14:33:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2025-03-03 14:33:07,874 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:07,874 INFO L218 NwaCegarLoop]: trace histogram [85, 85, 69, 42, 42, 42, 42, 42, 42, 42, 27, 16, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:07,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:08,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:08,075 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:08,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash -60838961, now seen corresponding path program 9 times [2025-03-03 14:33:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:08,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334178649] [2025-03-03 14:33:08,075 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:08,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:08,087 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 583 statements into 78 equivalence classes. [2025-03-03 14:33:08,118 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 245 of 583 statements. [2025-03-03 14:33:08,118 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-03-03 14:33:08,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 2966 refuted. 0 times theorem prover too weak. 16635 trivial. 0 not checked. [2025-03-03 14:33:08,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:08,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334178649] [2025-03-03 14:33:08,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334178649] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:08,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952523289] [2025-03-03 14:33:08,349 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:08,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:08,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:08,351 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:08,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:33:08,441 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 583 statements into 78 equivalence classes. [2025-03-03 14:33:08,499 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 245 of 583 statements. [2025-03-03 14:33:08,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-03-03 14:33:08,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:08,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:33:08,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 2966 refuted. 0 times theorem prover too weak. 16635 trivial. 0 not checked. [2025-03-03 14:33:08,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 3043 refuted. 0 times theorem prover too weak. 16558 trivial. 0 not checked. [2025-03-03 14:33:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952523289] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:10,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:10,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-03 14:33:10,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766896463] [2025-03-03 14:33:10,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:10,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:33:10,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:10,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:33:10,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:33:10,773 INFO L87 Difference]: Start difference. First operand 88 states and 133 transitions. Second operand has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-03-03 14:33:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:10,949 INFO L93 Difference]: Finished difference Result 97 states and 155 transitions. [2025-03-03 14:33:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:33:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 583 [2025-03-03 14:33:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:10,951 INFO L225 Difference]: With dead ends: 97 [2025-03-03 14:33:10,951 INFO L226 Difference]: Without dead ends: 93 [2025-03-03 14:33:10,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1156 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:33:10,952 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:10,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 102 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-03 14:33:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-03-03 14:33:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 61 states have internal predecessors, (66), 16 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (69), 23 states have call predecessors, (69), 16 states have call successors, (69) [2025-03-03 14:33:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 151 transitions. [2025-03-03 14:33:10,974 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 151 transitions. Word has length 583 [2025-03-03 14:33:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:10,975 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 151 transitions. [2025-03-03 14:33:10,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-03-03 14:33:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 151 transitions. [2025-03-03 14:33:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2025-03-03 14:33:10,980 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:10,980 INFO L218 NwaCegarLoop]: trace histogram [141, 141, 114, 70, 70, 70, 70, 70, 70, 70, 44, 27, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:10,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:11,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 14:33:11,184 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:11,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1772432010, now seen corresponding path program 10 times [2025-03-03 14:33:11,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:11,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787080341] [2025-03-03 14:33:11,185 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:11,200 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 964 statements into 2 equivalence classes. [2025-03-03 14:33:11,268 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 820 of 964 statements. [2025-03-03 14:33:11,269 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:33:11,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 1293 proven. 6424 refuted. 0 times theorem prover too weak. 47864 trivial. 0 not checked. [2025-03-03 14:33:11,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787080341] [2025-03-03 14:33:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787080341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825963348] [2025-03-03 14:33:11,923 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:11,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:11,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:11,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 14:33:12,077 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 964 statements into 2 equivalence classes. [2025-03-03 14:33:12,203 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 820 of 964 statements. [2025-03-03 14:33:12,203 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:33:12,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:12,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:33:12,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 20187 proven. 843 refuted. 0 times theorem prover too weak. 34551 trivial. 0 not checked. [2025-03-03 14:33:12,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 1383 proven. 7581 refuted. 0 times theorem prover too weak. 46617 trivial. 0 not checked. [2025-03-03 14:33:15,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825963348] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:15,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:15,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-03-03 14:33:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831288982] [2025-03-03 14:33:15,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:15,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:33:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:15,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:33:15,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:33:15,755 INFO L87 Difference]: Start difference. First operand 93 states and 151 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) [2025-03-03 14:33:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:16,074 INFO L93 Difference]: Finished difference Result 193 states and 378 transitions. [2025-03-03 14:33:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 14:33:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) Word has length 964 [2025-03-03 14:33:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:16,076 INFO L225 Difference]: With dead ends: 193 [2025-03-03 14:33:16,076 INFO L226 Difference]: Without dead ends: 103 [2025-03-03 14:33:16,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1968 GetRequests, 1910 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 14:33:16,079 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:16,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 140 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:33:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-03 14:33:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2025-03-03 14:33:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 58 states have internal predecessors, (62), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (51), 17 states have call predecessors, (51), 15 states have call successors, (51) [2025-03-03 14:33:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 128 transitions. [2025-03-03 14:33:16,092 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 128 transitions. Word has length 964 [2025-03-03 14:33:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:16,093 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 128 transitions. [2025-03-03 14:33:16,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) [2025-03-03 14:33:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 128 transitions. [2025-03-03 14:33:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2025-03-03 14:33:16,099 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:16,099 INFO L218 NwaCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:16,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:16,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 14:33:16,300 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:16,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1898637249, now seen corresponding path program 11 times [2025-03-03 14:33:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163555016] [2025-03-03 14:33:16,300 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:16,319 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1059 statements into 126 equivalence classes. [2025-03-03 14:33:16,393 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) and asserted 513 of 1059 statements. [2025-03-03 14:33:16,393 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2025-03-03 14:33:16,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 5023 proven. 5215 refuted. 0 times theorem prover too weak. 56956 trivial. 0 not checked. [2025-03-03 14:33:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163555016] [2025-03-03 14:33:16,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163555016] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438628101] [2025-03-03 14:33:16,984 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:16,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:16,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:16,986 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:16,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 14:33:17,159 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1059 statements into 126 equivalence classes. [2025-03-03 14:33:17,306 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) and asserted 513 of 1059 statements. [2025-03-03 14:33:17,306 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2025-03-03 14:33:17,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:17,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:33:17,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 34209 proven. 1768 refuted. 0 times theorem prover too weak. 31217 trivial. 0 not checked. [2025-03-03 14:33:17,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 4913 proven. 5212 refuted. 0 times theorem prover too weak. 57069 trivial. 0 not checked. [2025-03-03 14:33:21,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438628101] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:21,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:21,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 35 [2025-03-03 14:33:21,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874233145] [2025-03-03 14:33:21,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:21,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 14:33:21,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:21,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 14:33:21,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:33:21,061 INFO L87 Difference]: Start difference. First operand 86 states and 128 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) [2025-03-03 14:33:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:21,415 INFO L93 Difference]: Finished difference Result 195 states and 353 transitions. [2025-03-03 14:33:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-03 14:33:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) Word has length 1059 [2025-03-03 14:33:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:21,416 INFO L225 Difference]: With dead ends: 195 [2025-03-03 14:33:21,416 INFO L226 Difference]: Without dead ends: 112 [2025-03-03 14:33:21,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2169 GetRequests, 2100 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=833, Invalid=2589, Unknown=0, NotChecked=0, Total=3422 [2025-03-03 14:33:21,418 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 156 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:21,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 171 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:33:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-03 14:33:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2025-03-03 14:33:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 67 states have internal predecessors, (71), 18 states have call successors, (18), 13 states have call predecessors, (18), 10 states have return successors, (53), 17 states have call predecessors, (53), 18 states have call successors, (53) [2025-03-03 14:33:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-03-03 14:33:21,428 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 1059 [2025-03-03 14:33:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:21,428 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-03-03 14:33:21,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) [2025-03-03 14:33:21,428 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-03-03 14:33:21,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2025-03-03 14:33:21,432 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:21,432 INFO L218 NwaCegarLoop]: trace histogram [119, 119, 96, 59, 59, 59, 59, 59, 59, 59, 37, 23, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:21,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:21,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 14:33:21,637 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:21,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:21,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1402662446, now seen corresponding path program 12 times [2025-03-03 14:33:21,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:21,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616129983] [2025-03-03 14:33:21,638 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:21,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:21,653 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 814 statements into 93 equivalence classes. [2025-03-03 14:33:21,675 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 239 of 814 statements. [2025-03-03 14:33:21,675 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-03-03 14:33:21,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1358 proven. 3585 refuted. 0 times theorem prover too weak. 34545 trivial. 0 not checked. [2025-03-03 14:33:21,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616129983] [2025-03-03 14:33:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616129983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590067686] [2025-03-03 14:33:21,864 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:21,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:21,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:21,867 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:21,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 14:33:22,056 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 814 statements into 93 equivalence classes. [2025-03-03 14:33:22,113 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 239 of 814 statements. [2025-03-03 14:33:22,113 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-03-03 14:33:22,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:22,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:33:22,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1358 proven. 3585 refuted. 0 times theorem prover too weak. 34545 trivial. 0 not checked. [2025-03-03 14:33:22,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1366 proven. 3654 refuted. 0 times theorem prover too weak. 34468 trivial. 0 not checked. [2025-03-03 14:33:24,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590067686] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:24,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:24,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-03 14:33:24,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779309087] [2025-03-03 14:33:24,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:24,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:33:24,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:24,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:33:24,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:33:24,725 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-03 14:33:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:24,825 INFO L93 Difference]: Finished difference Result 110 states and 170 transitions. [2025-03-03 14:33:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:33:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 814 [2025-03-03 14:33:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:24,827 INFO L225 Difference]: With dead ends: 110 [2025-03-03 14:33:24,827 INFO L226 Difference]: Without dead ends: 106 [2025-03-03 14:33:24,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1618 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:33:24,828 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:24,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-03 14:33:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2025-03-03 14:33:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 70 states have internal predecessors, (74), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (65), 19 states have call predecessors, (65), 19 states have call successors, (65) [2025-03-03 14:33:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 158 transitions. [2025-03-03 14:33:24,835 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 158 transitions. Word has length 814 [2025-03-03 14:33:24,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:24,836 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 158 transitions. [2025-03-03 14:33:24,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-03 14:33:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 158 transitions. [2025-03-03 14:33:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2025-03-03 14:33:24,860 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:24,860 INFO L218 NwaCegarLoop]: trace histogram [225, 225, 182, 112, 112, 112, 112, 112, 112, 112, 70, 43, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:24,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:25,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 14:33:25,064 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:25,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:25,065 INFO L85 PathProgramCache]: Analyzing trace with hash -110103902, now seen corresponding path program 13 times [2025-03-03 14:33:25,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:25,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125084101] [2025-03-03 14:33:25,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:25,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:25,087 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1536 statements into 1 equivalence classes. [2025-03-03 14:33:25,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1536 of 1536 statements. [2025-03-03 14:33:25,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:25,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10624 refuted. 0 times theorem prover too weak. 130059 trivial. 0 not checked. [2025-03-03 14:33:26,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:26,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125084101] [2025-03-03 14:33:26,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125084101] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:26,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458191342] [2025-03-03 14:33:26,820 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:26,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:26,822 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:26,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 14:33:27,055 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1536 statements into 1 equivalence classes. [2025-03-03 14:33:27,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1536 of 1536 statements. [2025-03-03 14:33:27,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:27,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:27,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 3429 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:33:27,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10624 refuted. 0 times theorem prover too weak. 130059 trivial. 0 not checked. [2025-03-03 14:33:27,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10750 refuted. 0 times theorem prover too weak. 129933 trivial. 0 not checked. [2025-03-03 14:33:32,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458191342] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:32,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:32,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2025-03-03 14:33:32,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133641430] [2025-03-03 14:33:32,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:32,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 14:33:32,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:32,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 14:33:32,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:33:32,415 INFO L87 Difference]: Start difference. First operand 103 states and 158 transitions. Second operand has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2025-03-03 14:33:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:32,612 INFO L93 Difference]: Finished difference Result 120 states and 211 transitions. [2025-03-03 14:33:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:33:32,612 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1536 [2025-03-03 14:33:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:32,615 INFO L225 Difference]: With dead ends: 120 [2025-03-03 14:33:32,615 INFO L226 Difference]: Without dead ends: 116 [2025-03-03 14:33:32,616 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3102 GetRequests, 3060 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 14:33:32,617 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:32,617 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 123 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-03 14:33:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2025-03-03 14:33:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 73 states have internal predecessors, (77), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (79), 21 states have call predecessors, (79), 20 states have call successors, (79) [2025-03-03 14:33:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 176 transitions. [2025-03-03 14:33:32,628 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 176 transitions. Word has length 1536 [2025-03-03 14:33:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:32,629 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 176 transitions. [2025-03-03 14:33:32,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2025-03-03 14:33:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 176 transitions. [2025-03-03 14:33:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2408 [2025-03-03 14:33:32,671 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:32,672 INFO L218 NwaCegarLoop]: trace histogram [353, 353, 285, 176, 176, 176, 176, 176, 176, 176, 109, 68, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:32,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:32,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:32,872 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:32,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1104519535, now seen corresponding path program 14 times [2025-03-03 14:33:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437465725] [2025-03-03 14:33:32,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:32,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:32,905 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2407 statements into 2 equivalence classes. [2025-03-03 14:33:33,219 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2407 of 2407 statements. [2025-03-03 14:33:33,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:33,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18747 refuted. 0 times theorem prover too weak. 329397 trivial. 0 not checked. [2025-03-03 14:33:37,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:37,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437465725] [2025-03-03 14:33:37,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437465725] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:37,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782668206] [2025-03-03 14:33:37,282 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:37,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:37,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:37,284 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:37,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 14:33:37,572 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2407 statements into 2 equivalence classes. [2025-03-03 14:33:37,935 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2407 of 2407 statements. [2025-03-03 14:33:37,935 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:37,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:37,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 5363 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:33:37,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18747 refuted. 0 times theorem prover too weak. 329397 trivial. 0 not checked. [2025-03-03 14:33:38,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18902 refuted. 0 times theorem prover too weak. 329242 trivial. 0 not checked. [2025-03-03 14:33:45,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782668206] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:45,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:45,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2025-03-03 14:33:45,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626761298] [2025-03-03 14:33:45,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:45,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:33:45,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:45,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:33:45,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:33:45,778 INFO L87 Difference]: Start difference. First operand 108 states and 176 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-03-03 14:33:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:46,017 INFO L93 Difference]: Finished difference Result 117 states and 200 transitions. [2025-03-03 14:33:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:33:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 2407 [2025-03-03 14:33:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:46,020 INFO L225 Difference]: With dead ends: 117 [2025-03-03 14:33:46,020 INFO L226 Difference]: Without dead ends: 113 [2025-03-03 14:33:46,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4847 GetRequests, 4801 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 14:33:46,021 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 204 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:46,021 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 114 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:33:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-03 14:33:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2025-03-03 14:33:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 76 states have internal predecessors, (80), 21 states have call successors, (21), 13 states have call predecessors, (21), 13 states have return successors, (95), 23 states have call predecessors, (95), 21 states have call successors, (95) [2025-03-03 14:33:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 196 transitions. [2025-03-03 14:33:46,028 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 196 transitions. Word has length 2407 [2025-03-03 14:33:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:46,030 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 196 transitions. [2025-03-03 14:33:46,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-03-03 14:33:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 196 transitions. [2025-03-03 14:33:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4696 [2025-03-03 14:33:46,121 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:46,121 INFO L218 NwaCegarLoop]: trace histogram [689, 689, 557, 344, 344, 344, 344, 344, 344, 344, 213, 132, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:46,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 14:33:46,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 14:33:46,322 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:46,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1406486443, now seen corresponding path program 15 times [2025-03-03 14:33:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:46,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076253660] [2025-03-03 14:33:46,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:46,381 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 4695 statements into 584 equivalence classes. [2025-03-03 14:33:46,419 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) and asserted 417 of 4695 statements. [2025-03-03 14:33:46,419 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2025-03-03 14:33:46,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41026 refuted. 0 times theorem prover too weak. 1293033 trivial. 0 not checked. [2025-03-03 14:33:46,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:46,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076253660] [2025-03-03 14:33:46,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076253660] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:46,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050350250] [2025-03-03 14:33:46,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:46,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:46,781 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:46,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 14:33:47,226 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 4695 statements into 584 equivalence classes. [2025-03-03 14:33:47,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) and asserted 417 of 4695 statements. [2025-03-03 14:33:47,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2025-03-03 14:33:47,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:47,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 14:33:47,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41026 refuted. 0 times theorem prover too weak. 1293033 trivial. 0 not checked. [2025-03-03 14:33:47,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41213 refuted. 0 times theorem prover too weak. 1292846 trivial. 0 not checked. [2025-03-03 14:34:01,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050350250] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:01,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:01,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2025-03-03 14:34:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590838076] [2025-03-03 14:34:01,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:01,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:34:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:01,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:34:01,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:34:01,592 INFO L87 Difference]: Start difference. First operand 113 states and 196 transitions. Second operand has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2025-03-03 14:34:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:01,921 INFO L93 Difference]: Finished difference Result 122 states and 222 transitions. [2025-03-03 14:34:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) Word has length 4695 [2025-03-03 14:34:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:01,926 INFO L225 Difference]: With dead ends: 122 [2025-03-03 14:34:01,926 INFO L226 Difference]: Without dead ends: 118 [2025-03-03 14:34:01,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9426 GetRequests, 9376 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=1062, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:34:01,927 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:01,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 134 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-03 14:34:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2025-03-03 14:34:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 79 states have internal predecessors, (83), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (113), 25 states have call predecessors, (113), 22 states have call successors, (113) [2025-03-03 14:34:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 218 transitions. [2025-03-03 14:34:01,935 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 218 transitions. Word has length 4695 [2025-03-03 14:34:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:01,937 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 218 transitions. [2025-03-03 14:34:01,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2025-03-03 14:34:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 218 transitions. [2025-03-03 14:34:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10116 [2025-03-03 14:34:02,289 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:02,291 INFO L218 NwaCegarLoop]: trace histogram [1485, 1485, 1201, 742, 742, 742, 742, 742, 742, 742, 459, 284, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:02,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:02,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 14:34:02,492 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:02,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1703657899, now seen corresponding path program 16 times [2025-03-03 14:34:02,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:02,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691255438] [2025-03-03 14:34:02,494 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:02,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:02,633 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 10115 statements into 2 equivalence classes. [2025-03-03 14:34:06,671 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 8627 of 10115 statements. [2025-03-03 14:34:06,671 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:06,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat