./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.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/id_i20_o20-1.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 c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:35:43,704 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:35:43,755 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:35:43,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:35:43,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:35:43,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:35:43,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:35:43,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:35:43,778 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:35:43,779 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:35:43,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:35:43,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:35:43,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:35:43,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:35:43,780 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:35:43,781 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:35:43,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:35:43,782 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:35:43,782 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:35:43,782 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:35:43,782 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:35:43,782 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:35:43,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:35:43,782 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:35:43,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:35:43,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:35:43,783 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:35:43,783 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 -> c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 [2025-03-03 14:35:44,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:35:44,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:35:44,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:35:44,089 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:35:44,089 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:35:44,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2025-03-03 14:35:45,163 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d8034df3/86a62649839e4ce1a08e992bd98d65b2/FLAG9662d96e3 [2025-03-03 14:35:45,398 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:35:45,399 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2025-03-03 14:35:45,404 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d8034df3/86a62649839e4ce1a08e992bd98d65b2/FLAG9662d96e3 [2025-03-03 14:35:45,419 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d8034df3/86a62649839e4ce1a08e992bd98d65b2 [2025-03-03 14:35:45,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:35:45,423 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:35:45,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:35:45,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:35:45,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:35:45,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b943e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45, skipping insertion in model container [2025-03-03 14:35:45,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,440 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:35:45,540 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/id_i20_o20-1.c[454,467] [2025-03-03 14:35:45,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:35:45,548 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:35:45,558 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/id_i20_o20-1.c[454,467] [2025-03-03 14:35:45,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:35:45,569 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:35:45,570 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45 WrapperNode [2025-03-03 14:35:45,570 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:35:45,571 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:35:45,571 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:35:45,571 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:35:45,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,581 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,592 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2025-03-03 14:35:45,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:35:45,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:35:45,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:35:45,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:35:45,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,601 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,608 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 14:35:45,608 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,608 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,612 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,612 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,613 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,614 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:35:45,614 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:35:45,614 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:35:45,614 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:35:45,615 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (1/1) ... [2025-03-03 14:35:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:35:45,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:45,637 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 14:35:45,639 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 14:35:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:35:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:35:45,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:35:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:35:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure id [2025-03-03 14:35:45,654 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2025-03-03 14:35:45,695 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:35:45,697 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:35:45,764 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: havoc #t~ret4; [2025-03-03 14:35:45,770 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-03-03 14:35:45,770 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:35:45,777 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:35:45,778 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:35:45,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:35:45 BoogieIcfgContainer [2025-03-03 14:35:45,779 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:35:45,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:35:45,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:35:45,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:35:45,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:35:45" (1/3) ... [2025-03-03 14:35:45,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dccd257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:35:45, skipping insertion in model container [2025-03-03 14:35:45,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:35:45" (2/3) ... [2025-03-03 14:35:45,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dccd257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:35:45, skipping insertion in model container [2025-03-03 14:35:45,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:35:45" (3/3) ... [2025-03-03 14:35:45,787 INFO L128 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2025-03-03 14:35:45,798 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:35:45,800 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG id_i20_o20-1.c that has 2 procedures, 16 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:35:45,833 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:35:45,843 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;@5195a0b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:35:45,844 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:35:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:35:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:35:45,852 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:45,852 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:45,852 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:45,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:45,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1536782931, now seen corresponding path program 1 times [2025-03-03 14:35:45,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:45,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983601701] [2025-03-03 14:35:45,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:45,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:45,913 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:35:45,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:35:45,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:45,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:46,027 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 14:35:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983601701] [2025-03-03 14:35:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983601701] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:35:46,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:35:46,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:35:46,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891149195] [2025-03-03 14:35:46,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:35:46,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:35:46,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:46,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:35:46,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:35:46,045 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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 14:35:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:46,091 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2025-03-03 14:35:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:35:46,093 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 14:35:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:46,097 INFO L225 Difference]: With dead ends: 25 [2025-03-03 14:35:46,097 INFO L226 Difference]: Without dead ends: 15 [2025-03-03 14:35:46,099 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 14:35:46,101 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:46,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 40 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:35:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-03 14:35:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-03 14:35:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:35:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2025-03-03 14:35:46,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2025-03-03 14:35:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:46,123 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2025-03-03 14:35:46,123 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 14:35:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2025-03-03 14:35:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-03 14:35:46,124 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:46,124 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:46,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:35:46,124 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:46,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:46,126 INFO L85 PathProgramCache]: Analyzing trace with hash -808024836, now seen corresponding path program 1 times [2025-03-03 14:35:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:46,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677122385] [2025-03-03 14:35:46,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:46,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:46,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 14:35:46,146 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 14:35:46,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:46,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 14:35:46,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:46,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677122385] [2025-03-03 14:35:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677122385] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:46,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182305073] [2025-03-03 14:35:46,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:46,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:46,253 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 14:35:46,254 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 14:35:46,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 14:35:46,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 14:35:46,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:46,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:46,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:35:46,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 14:35:46,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:35:46,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182305073] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:46,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:46,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-03-03 14:35:46,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962571499] [2025-03-03 14:35:46,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:46,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 14:35:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:46,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 14:35:46,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-03 14:35:46,523 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 14:35:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:46,555 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2025-03-03 14:35:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 14:35:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2025-03-03 14:35:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:46,556 INFO L225 Difference]: With dead ends: 22 [2025-03-03 14:35:46,556 INFO L226 Difference]: Without dead ends: 18 [2025-03-03 14:35:46,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 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 14:35:46,557 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:46,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:35:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-03 14:35:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-03 14:35:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 14:35:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2025-03-03 14:35:46,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2025-03-03 14:35:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:46,561 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2025-03-03 14:35:46,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 14:35:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2025-03-03 14:35:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-03 14:35:46,561 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:46,561 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:46,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:46,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:46,766 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:46,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1152729037, now seen corresponding path program 2 times [2025-03-03 14:35:46,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:46,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849913410] [2025-03-03 14:35:46,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:46,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:46,772 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-03 14:35:46,777 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 14:35:46,778 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:46,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:35:46,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849913410] [2025-03-03 14:35:46,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849913410] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769391328] [2025-03-03 14:35:46,901 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:46,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:46,904 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 14:35:46,905 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 14:35:46,927 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-03 14:35:46,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 14:35:46,941 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:46,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:46,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:35:46,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-03 14:35:46,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 14:35:47,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769391328] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:47,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:47,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2025-03-03 14:35:47,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346443543] [2025-03-03 14:35:47,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:47,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 14:35:47,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:47,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 14:35:47,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-03-03 14:35:47,225 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:35:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:47,289 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2025-03-03 14:35:47,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 14:35:47,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 22 [2025-03-03 14:35:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:47,290 INFO L225 Difference]: With dead ends: 25 [2025-03-03 14:35:47,290 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 14:35:47,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:35:47,291 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:47,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 47 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:35:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 14:35:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-03 14:35:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 14:35:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2025-03-03 14:35:47,295 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2025-03-03 14:35:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:47,295 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2025-03-03 14:35:47,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:35:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2025-03-03 14:35:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-03 14:35:47,295 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:47,296 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:47,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:35:47,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-03 14:35:47,496 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:47,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:47,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1224835100, now seen corresponding path program 3 times [2025-03-03 14:35:47,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:47,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379637206] [2025-03-03 14:35:47,497 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:47,501 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-03-03 14:35:47,506 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 14:35:47,506 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 14:35:47,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-03 14:35:47,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:47,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379637206] [2025-03-03 14:35:47,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379637206] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:47,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095825034] [2025-03-03 14:35:47,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:47,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:47,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:47,642 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 14:35:47,652 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 14:35:47,672 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-03-03 14:35:47,682 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 14:35:47,682 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 14:35:47,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:47,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:35:47,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 14:35:47,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:35:48,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095825034] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:48,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:48,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2025-03-03 14:35:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110902272] [2025-03-03 14:35:48,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:48,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:35:48,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:48,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:35:48,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:35:48,122 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-03 14:35:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:48,212 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2025-03-03 14:35:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:35:48,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 28 [2025-03-03 14:35:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:48,213 INFO L225 Difference]: With dead ends: 28 [2025-03-03 14:35:48,213 INFO L226 Difference]: Without dead ends: 24 [2025-03-03 14:35:48,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:35:48,214 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:48,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 68 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:35:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-03 14:35:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-03 14:35:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 14:35:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2025-03-03 14:35:48,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2025-03-03 14:35:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:48,219 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2025-03-03 14:35:48,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 17 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-03 14:35:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2025-03-03 14:35:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 14:35:48,220 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:48,220 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:48,226 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 14:35:48,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:48,423 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:48,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1742358035, now seen corresponding path program 4 times [2025-03-03 14:35:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:48,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950323385] [2025-03-03 14:35:48,424 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:48,427 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-03 14:35:48,430 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 14:35:48,431 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:35:48,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-03 14:35:48,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950323385] [2025-03-03 14:35:48,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950323385] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:48,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014440556] [2025-03-03 14:35:48,539 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:48,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:48,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:48,544 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 14:35:48,546 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 14:35:48,567 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-03 14:35:48,577 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 14:35:48,577 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:35:48,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:48,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:35:48,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-03 14:35:48,640 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 14:35:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014440556] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:49,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:49,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 13] total 20 [2025-03-03 14:35:49,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559418419] [2025-03-03 14:35:49,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:49,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:35:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:49,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:35:49,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:35:49,177 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-03 14:35:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:49,275 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2025-03-03 14:35:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:35:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 34 [2025-03-03 14:35:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:49,277 INFO L225 Difference]: With dead ends: 43 [2025-03-03 14:35:49,278 INFO L226 Difference]: Without dead ends: 39 [2025-03-03 14:35:49,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:35:49,279 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:49,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:35:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-03 14:35:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2025-03-03 14:35:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-03 14:35:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2025-03-03 14:35:49,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 34 [2025-03-03 14:35:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:49,289 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2025-03-03 14:35:49,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-03 14:35:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2025-03-03 14:35:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-03 14:35:49,290 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:49,290 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:49,296 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 14:35:49,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:49,491 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:49,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:49,492 INFO L85 PathProgramCache]: Analyzing trace with hash 854543964, now seen corresponding path program 5 times [2025-03-03 14:35:49,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:49,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76483156] [2025-03-03 14:35:49,492 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:49,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:49,496 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 8 equivalence classes. [2025-03-03 14:35:49,505 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 14:35:49,506 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 14:35:49,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-03 14:35:49,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76483156] [2025-03-03 14:35:49,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76483156] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691816651] [2025-03-03 14:35:49,648 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:49,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:49,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:49,650 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 14:35:49,651 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 14:35:49,679 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 8 equivalence classes. [2025-03-03 14:35:49,691 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 14:35:49,691 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 14:35:49,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:49,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:35:49,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-03 14:35:49,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-03 14:35:51,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691816651] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:51,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:51,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 22 [2025-03-03 14:35:51,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569819032] [2025-03-03 14:35:51,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:51,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 14:35:51,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:51,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 14:35:51,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:35:51,361 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 22 states have internal predecessors, (42), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2025-03-03 14:35:51,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:51,460 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2025-03-03 14:35:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:35:51,463 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 22 states have internal predecessors, (42), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) Word has length 52 [2025-03-03 14:35:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:51,463 INFO L225 Difference]: With dead ends: 49 [2025-03-03 14:35:51,463 INFO L226 Difference]: Without dead ends: 42 [2025-03-03 14:35:51,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:35:51,464 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:51,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 85 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:35:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-03 14:35:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2025-03-03 14:35:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-03 14:35:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2025-03-03 14:35:51,469 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 52 [2025-03-03 14:35:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:51,469 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2025-03-03 14:35:51,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 22 states have internal predecessors, (42), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2025-03-03 14:35:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2025-03-03 14:35:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-03 14:35:51,470 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:51,470 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:51,476 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 14:35:51,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:51,672 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:51,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1345059283, now seen corresponding path program 6 times [2025-03-03 14:35:51,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:51,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031747956] [2025-03-03 14:35:51,673 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:51,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:51,685 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 58 statements into 9 equivalence classes. [2025-03-03 14:35:51,695 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 58 of 58 statements. [2025-03-03 14:35:51,695 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 14:35:51,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 132 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-03 14:35:51,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:51,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031747956] [2025-03-03 14:35:51,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031747956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:51,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431262969] [2025-03-03 14:35:51,890 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:51,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:51,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:51,892 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 14:35:51,894 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 14:35:51,949 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 58 statements into 9 equivalence classes. [2025-03-03 14:35:51,963 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 58 of 58 statements. [2025-03-03 14:35:51,963 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 14:35:51,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:51,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:35:51,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-03 14:35:52,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 14:35:54,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431262969] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:54,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:54,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 21] total 28 [2025-03-03 14:35:54,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196026764] [2025-03-03 14:35:54,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:54,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:35:54,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:54,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:35:54,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:35:54,107 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2025-03-03 14:35:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:54,216 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2025-03-03 14:35:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:35:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) Word has length 58 [2025-03-03 14:35:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:54,217 INFO L225 Difference]: With dead ends: 52 [2025-03-03 14:35:54,217 INFO L226 Difference]: Without dead ends: 45 [2025-03-03 14:35:54,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=394, Invalid=866, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 14:35:54,218 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:54,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 93 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-03 14:35:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2025-03-03 14:35:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-03 14:35:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2025-03-03 14:35:54,223 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 58 [2025-03-03 14:35:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:54,223 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2025-03-03 14:35:54,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2025-03-03 14:35:54,223 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2025-03-03 14:35:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-03 14:35:54,224 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:54,224 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:54,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:54,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:54,425 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:54,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:54,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1264180868, now seen corresponding path program 7 times [2025-03-03 14:35:54,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:54,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955212960] [2025-03-03 14:35:54,425 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:54,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:54,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-03 14:35:54,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 14:35:54,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:54,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-03-03 14:35:54,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:54,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955212960] [2025-03-03 14:35:54,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955212960] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:54,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623807309] [2025-03-03 14:35:54,639 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:54,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:54,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:54,641 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 14:35:54,642 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 14:35:54,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-03 14:35:54,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 14:35:54,729 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:54,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:54,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:35:54,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-03-03 14:35:54,782 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 14:35:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623807309] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:57,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:57,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2025-03-03 14:35:57,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334107917] [2025-03-03 14:35:57,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:57,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 14:35:57,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:57,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 14:35:57,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:35:57,372 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2025-03-03 14:35:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:57,484 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2025-03-03 14:35:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:35:57,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) Word has length 64 [2025-03-03 14:35:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:57,485 INFO L225 Difference]: With dead ends: 55 [2025-03-03 14:35:57,485 INFO L226 Difference]: Without dead ends: 48 [2025-03-03 14:35:57,485 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 14:35:57,486 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:57,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 104 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-03 14:35:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2025-03-03 14:35:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-03 14:35:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2025-03-03 14:35:57,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 64 [2025-03-03 14:35:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:57,494 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2025-03-03 14:35:57,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2025-03-03 14:35:57,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2025-03-03 14:35:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-03 14:35:57,494 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:57,495 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:57,500 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 14:35:57,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:57,698 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:57,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:57,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1425680307, now seen corresponding path program 8 times [2025-03-03 14:35:57,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:57,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809376139] [2025-03-03 14:35:57,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:57,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:57,703 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 70 statements into 2 equivalence classes. [2025-03-03 14:35:57,708 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-03-03 14:35:57,708 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:57,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-03-03 14:35:57,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:57,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809376139] [2025-03-03 14:35:57,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809376139] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:57,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221567256] [2025-03-03 14:35:57,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:57,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:57,903 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 14:35:57,904 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 14:35:58,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 70 statements into 2 equivalence classes. [2025-03-03 14:35:58,028 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-03-03 14:35:58,028 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:58,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:58,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:35:58,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-03 14:35:58,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:36:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 14:36:01,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221567256] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:36:01,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:36:01,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 29 [2025-03-03 14:36:01,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600348944] [2025-03-03 14:36:01,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:36:01,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:36:01,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:36:01,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:36:01,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:36:01,456 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 29 states have internal predecessors, (55), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-03 14:36:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:36:01,604 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2025-03-03 14:36:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:36:01,604 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 29 states have internal predecessors, (55), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) Word has length 70 [2025-03-03 14:36:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:36:01,605 INFO L225 Difference]: With dead ends: 58 [2025-03-03 14:36:01,605 INFO L226 Difference]: Without dead ends: 51 [2025-03-03 14:36:01,605 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:36:01,606 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:36:01,606 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 100 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:36:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-03 14:36:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2025-03-03 14:36:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2025-03-03 14:36:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2025-03-03 14:36:01,610 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 70 [2025-03-03 14:36:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:36:01,610 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2025-03-03 14:36:01,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 29 states have internal predecessors, (55), 13 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-03 14:36:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2025-03-03 14:36:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-03 14:36:01,611 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:36:01,611 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:36:01,618 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 14:36:01,812 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,SelfDestructingSolverStorable8 [2025-03-03 14:36:01,812 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:36:01,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:36:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1101675676, now seen corresponding path program 9 times [2025-03-03 14:36:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:36:01,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412244732] [2025-03-03 14:36:01,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:36:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:36:01,819 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 12 equivalence classes. [2025-03-03 14:36:01,832 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 14:36:01,832 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-03 14:36:01,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 30 proven. 230 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2025-03-03 14:36:02,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:36:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412244732] [2025-03-03 14:36:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412244732] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:36:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830264149] [2025-03-03 14:36:02,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:36:02,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:02,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:36:02,072 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 14:36:02,074 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 14:36:02,228 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 12 equivalence classes. [2025-03-03 14:36:02,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 14:36:02,246 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-03 14:36:02,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:02,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 14:36:02,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:36:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2025-03-03 14:36:02,308 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:36:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-03 14:36:06,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830264149] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:36:06,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:36:06,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 27] total 34 [2025-03-03 14:36:06,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113860025] [2025-03-03 14:36:06,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:36:06,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 14:36:06,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:36:06,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 14:36:06,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 14:36:06,623 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (29), 13 states have call predecessors, (29), 16 states have call successors, (29) [2025-03-03 14:36:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:36:06,762 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2025-03-03 14:36:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:36:06,763 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (29), 13 states have call predecessors, (29), 16 states have call successors, (29) Word has length 76 [2025-03-03 14:36:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:36:06,764 INFO L225 Difference]: With dead ends: 61 [2025-03-03 14:36:06,765 INFO L226 Difference]: Without dead ends: 54 [2025-03-03 14:36:06,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 133 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1352, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 14:36:06,765 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 169 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:36:06,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 124 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:36:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-03 14:36:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2025-03-03 14:36:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2025-03-03 14:36:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2025-03-03 14:36:06,770 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 76 [2025-03-03 14:36:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:36:06,770 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2025-03-03 14:36:06,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (29), 13 states have call predecessors, (29), 16 states have call successors, (29) [2025-03-03 14:36:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2025-03-03 14:36:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-03 14:36:06,771 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:36:06,771 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:36:06,778 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 14:36:06,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 14:36:06,975 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:36:06,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:36:06,975 INFO L85 PathProgramCache]: Analyzing trace with hash -121729645, now seen corresponding path program 10 times [2025-03-03 14:36:06,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:36:06,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002590555] [2025-03-03 14:36:06,975 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:36:06,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:36:06,983 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-03 14:36:06,991 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-03 14:36:06,992 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:36:06,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 21 proven. 245 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2025-03-03 14:36:07,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:36:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002590555] [2025-03-03 14:36:07,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002590555] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:36:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113863273] [2025-03-03 14:36:07,208 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:36:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:36:07,210 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 14:36:07,212 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 14:36:07,431 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 82 statements into 2 equivalence classes. [2025-03-03 14:36:07,450 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-03 14:36:07,450 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:36:07,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:07,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 14:36:07,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:36:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-03-03 14:36:07,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:36:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-03 14:36:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113863273] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:36:13,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:36:13,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 29] total 36 [2025-03-03 14:36:13,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324096250] [2025-03-03 14:36:13,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:36:13,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 14:36:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:36:13,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 14:36:13,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 14:36:13,049 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2025-03-03 14:36:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:36:13,258 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2025-03-03 14:36:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 14:36:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) Word has length 82 [2025-03-03 14:36:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:36:13,262 INFO L225 Difference]: With dead ends: 73 [2025-03-03 14:36:13,262 INFO L226 Difference]: Without dead ends: 63 [2025-03-03 14:36:13,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 14:36:13,264 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 171 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:36:13,264 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 131 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:36:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-03 14:36:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2025-03-03 14:36:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2025-03-03 14:36:13,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2025-03-03 14:36:13,271 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 82 [2025-03-03 14:36:13,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:36:13,271 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2025-03-03 14:36:13,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (29), 15 states have call predecessors, (29), 18 states have call successors, (29) [2025-03-03 14:36:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2025-03-03 14:36:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-03-03 14:36:13,273 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:36:13,273 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:36:13,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 14:36:13,477 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,SelfDestructingSolverStorable10 [2025-03-03 14:36:13,477 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:36:13,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:36:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1090669276, now seen corresponding path program 11 times [2025-03-03 14:36:13,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:36:13,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146181958] [2025-03-03 14:36:13,477 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:36:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:36:13,485 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 100 statements into 16 equivalence classes. [2025-03-03 14:36:13,500 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 100 of 100 statements. [2025-03-03 14:36:13,500 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-03 14:36:13,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-03-03 14:36:13,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:36:13,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146181958] [2025-03-03 14:36:13,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146181958] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:36:13,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035478071] [2025-03-03 14:36:13,753 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:36:13,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:13,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:36:13,755 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 14:36:13,756 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 14:36:14,023 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 100 statements into 16 equivalence classes. [2025-03-03 14:36:14,045 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 100 of 100 statements. [2025-03-03 14:36:14,045 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-03 14:36:14,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:14,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-03 14:36:14,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:36:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-03-03 14:36:14,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:36:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-03-03 14:36:24,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035478071] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:36:24,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:36:24,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 37 [2025-03-03 14:36:24,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289975532] [2025-03-03 14:36:24,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:36:24,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 14:36:24,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:36:24,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 14:36:24,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 14:36:24,928 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-03 14:36:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:36:25,144 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2025-03-03 14:36:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 14:36:25,145 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) Word has length 100 [2025-03-03 14:36:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:36:25,146 INFO L225 Difference]: With dead ends: 73 [2025-03-03 14:36:25,146 INFO L226 Difference]: Without dead ends: 66 [2025-03-03 14:36:25,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 182 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=854, Invalid=1798, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 14:36:25,148 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:36:25,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 145 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:36:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-03 14:36:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2025-03-03 14:36:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2025-03-03 14:36:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2025-03-03 14:36:25,153 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 100 [2025-03-03 14:36:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:36:25,153 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2025-03-03 14:36:25,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (32), 16 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-03 14:36:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2025-03-03 14:36:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-03-03 14:36:25,154 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:36:25,154 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:36:25,161 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 14:36:25,354 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,SelfDestructingSolverStorable11 [2025-03-03 14:36:25,354 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:36:25,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:36:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash -37617325, now seen corresponding path program 12 times [2025-03-03 14:36:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:36:25,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014001328] [2025-03-03 14:36:25,355 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:36:25,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:36:25,364 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 17 equivalence classes. [2025-03-03 14:36:25,377 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 106 of 106 statements. [2025-03-03 14:36:25,377 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-03 14:36:25,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 52 proven. 458 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-03 14:36:25,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:36:25,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014001328] [2025-03-03 14:36:25,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014001328] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:36:25,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629948749] [2025-03-03 14:36:25,681 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:36:25,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:25,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:36:25,682 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 14:36:25,683 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 14:36:26,066 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 17 equivalence classes. [2025-03-03 14:36:26,091 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 106 of 106 statements. [2025-03-03 14:36:26,092 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-03 14:36:26,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:26,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-03 14:36:26,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:36:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2025-03-03 14:36:26,172 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:36:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-03-03 14:36:39,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629948749] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:36:39,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:36:39,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 37] total 44 [2025-03-03 14:36:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355486475] [2025-03-03 14:36:39,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:36:39,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 14:36:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:36:39,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 14:36:39,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1379, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 14:36:39,181 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (39), 18 states have call predecessors, (39), 21 states have call successors, (39) [2025-03-03 14:36:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:36:39,387 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2025-03-03 14:36:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 14:36:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (39), 18 states have call predecessors, (39), 21 states have call successors, (39) Word has length 106 [2025-03-03 14:36:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:36:39,388 INFO L225 Difference]: With dead ends: 76 [2025-03-03 14:36:39,388 INFO L226 Difference]: Without dead ends: 69 [2025-03-03 14:36:39,389 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 188 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1138, Invalid=2402, Unknown=0, NotChecked=0, Total=3540 [2025-03-03 14:36:39,389 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 125 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:36:39,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 164 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:36:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-03 14:36:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2025-03-03 14:36:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2025-03-03 14:36:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2025-03-03 14:36:39,400 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2025-03-03 14:36:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:36:39,401 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2025-03-03 14:36:39,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (39), 18 states have call predecessors, (39), 21 states have call successors, (39) [2025-03-03 14:36:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2025-03-03 14:36:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2025-03-03 14:36:39,402 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:36:39,402 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:36:39,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 14:36:39,603 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,SelfDestructingSolverStorable12 [2025-03-03 14:36:39,603 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:36:39,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:36:39,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1749695996, now seen corresponding path program 13 times [2025-03-03 14:36:39,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:36:39,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141517250] [2025-03-03 14:36:39,604 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:36:39,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:36:39,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-03-03 14:36:39,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-03-03 14:36:39,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:36:39,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2025-03-03 14:36:39,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:36:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141517250] [2025-03-03 14:36:39,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141517250] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:36:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157944537] [2025-03-03 14:36:39,934 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:36:39,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:39,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:36:39,936 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 14:36:39,938 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 14:36:40,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 112 statements into 1 equivalence classes. [2025-03-03 14:36:40,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 112 of 112 statements. [2025-03-03 14:36:40,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:36:40,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:40,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-03 14:36:40,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:36:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2025-03-03 14:36:40,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:36:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-03-03 14:36:56,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157944537] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:36:56,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:36:56,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 41 [2025-03-03 14:36:56,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951464593] [2025-03-03 14:36:56,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:36:56,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-03 14:36:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:36:56,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-03 14:36:56,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1218, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 14:36:56,397 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2025-03-03 14:36:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:36:56,607 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2025-03-03 14:36:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 14:36:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) Word has length 112 [2025-03-03 14:36:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:36:56,608 INFO L225 Difference]: With dead ends: 79 [2025-03-03 14:36:56,608 INFO L226 Difference]: Without dead ends: 72 [2025-03-03 14:36:56,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 204 SyntacticMatches, 18 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1068, Invalid=2238, Unknown=0, NotChecked=0, Total=3306 [2025-03-03 14:36:56,609 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:36:56,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 160 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:36:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-03 14:36:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2025-03-03 14:36:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2025-03-03 14:36:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2025-03-03 14:36:56,615 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 112 [2025-03-03 14:36:56,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:36:56,615 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2025-03-03 14:36:56,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (36), 18 states have call predecessors, (36), 20 states have call successors, (36) [2025-03-03 14:36:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2025-03-03 14:36:56,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-03 14:36:56,616 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:36:56,616 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:36:56,626 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 14:36:56,816 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,SelfDestructingSolverStorable13 [2025-03-03 14:36:56,817 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:36:56,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:36:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash 67964723, now seen corresponding path program 14 times [2025-03-03 14:36:56,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:36:56,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946266041] [2025-03-03 14:36:56,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:36:56,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:36:56,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-03-03 14:36:56,840 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-03-03 14:36:56,840 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:36:56,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2025-03-03 14:36:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:36:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946266041] [2025-03-03 14:36:57,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946266041] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:36:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608472058] [2025-03-03 14:36:57,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:36:57,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:36:57,174 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 14:36:57,175 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 14:36:57,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-03-03 14:36:57,904 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-03-03 14:36:57,904 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:36:57,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:57,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-03 14:36:57,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:36:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-03-03 14:36:57,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:37:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2025-03-03 14:37:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608472058] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:37:16,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:37:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 45 [2025-03-03 14:37:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997392833] [2025-03-03 14:37:16,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:37:16,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-03 14:37:16,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:37:16,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-03 14:37:16,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1454, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 14:37:16,770 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 45 states have internal predecessors, (87), 21 states have call successors, (21), 1 states have call predecessors, (21), 20 states have return successors, (39), 19 states have call predecessors, (39), 21 states have call successors, (39) [2025-03-03 14:37:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:37:17,062 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2025-03-03 14:37:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 14:37:17,063 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 45 states have internal predecessors, (87), 21 states have call successors, (21), 1 states have call predecessors, (21), 20 states have return successors, (39), 19 states have call predecessors, (39), 21 states have call successors, (39) Word has length 118 [2025-03-03 14:37:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:37:17,064 INFO L225 Difference]: With dead ends: 82 [2025-03-03 14:37:17,064 INFO L226 Difference]: Without dead ends: 75 [2025-03-03 14:37:17,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 213 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1305, Invalid=2727, Unknown=0, NotChecked=0, Total=4032 [2025-03-03 14:37:17,065 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 145 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:37:17,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 158 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:37:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-03 14:37:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2025-03-03 14:37:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2025-03-03 14:37:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2025-03-03 14:37:17,070 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 118 [2025-03-03 14:37:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:37:17,070 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2025-03-03 14:37:17,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 45 states have internal predecessors, (87), 21 states have call successors, (21), 1 states have call predecessors, (21), 20 states have return successors, (39), 19 states have call predecessors, (39), 21 states have call successors, (39) [2025-03-03 14:37:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2025-03-03 14:37:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-03 14:37:17,071 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:37:17,071 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:37:17,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 14:37:17,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:37:17,272 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:37:17,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:37:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1153923356, now seen corresponding path program 15 times [2025-03-03 14:37:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:37:17,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698896746] [2025-03-03 14:37:17,272 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:37:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:37:17,287 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 124 statements into 20 equivalence classes. [2025-03-03 14:37:17,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) and asserted 124 of 124 statements. [2025-03-03 14:37:17,302 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2025-03-03 14:37:17,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 100 proven. 636 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2025-03-03 14:37:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:37:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698896746] [2025-03-03 14:37:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698896746] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:37:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410570669] [2025-03-03 14:37:17,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:37:17,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:37:17,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:37:17,685 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 14:37:17,686 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 14:37:18,598 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 124 statements into 20 equivalence classes. [2025-03-03 14:37:18,625 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) and asserted 124 of 124 statements. [2025-03-03 14:37:18,626 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2025-03-03 14:37:18,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:18,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-03 14:37:18,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:37:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2025-03-03 14:37:18,710 INFO L312 TraceCheckSpWp]: Computing backward predicates...