./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o200.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.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_o200.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 d03bd1f663815b2d7649a36366d573d68ceb56233e8a1c24e8a8623e8a524f12 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 07:59:34,249 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 07:59:34,333 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 07:59:34,339 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 07:59:34,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 07:59:34,366 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 07:59:34,366 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 07:59:34,367 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 07:59:34,369 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 07:59:34,370 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 07:59:34,371 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 07:59:34,371 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 07:59:34,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 07:59:34,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 07:59:34,374 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 07:59:34,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 07:59:34,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 07:59:34,375 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 07:59:34,375 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 07:59:34,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 07:59:34,378 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 07:59:34,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 07:59:34,379 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 07:59:34,379 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 07:59:34,380 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 07:59:34,380 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 07:59:34,380 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 07:59:34,380 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 07:59:34,381 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 07:59:34,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 07:59:34,388 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 07:59:34,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 07:59:34,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:59:34,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 07:59:34,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 07:59:34,389 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 07:59:34,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 07:59:34,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 07:59:34,390 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 07:59:34,390 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 07:59:34,390 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 07:59:34,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 07:59:34,392 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03bd1f663815b2d7649a36366d573d68ceb56233e8a1c24e8a8623e8a524f12 [2024-11-16 07:59:34,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 07:59:34,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 07:59:34,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 07:59:34,701 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 07:59:34,702 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 07:59:34,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o200.c [2024-11-16 07:59:36,189 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 07:59:36,385 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 07:59:36,385 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o200.c [2024-11-16 07:59:36,392 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0038c33c/2efa8ec945414317af761f7cbd27b282/FLAG871fc3141 [2024-11-16 07:59:36,753 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0038c33c/2efa8ec945414317af761f7cbd27b282 [2024-11-16 07:59:36,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 07:59:36,756 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 07:59:36,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 07:59:36,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 07:59:36,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 07:59:36,763 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:59:36" (1/1) ... [2024-11-16 07:59:36,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46586f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:36, skipping insertion in model container [2024-11-16 07:59:36,765 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:59:36" (1/1) ... [2024-11-16 07:59:36,782 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 07:59:36,999 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_o200.c[518,531] [2024-11-16 07:59:37,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:59:37,016 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 07:59:37,031 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_o200.c[518,531] [2024-11-16 07:59:37,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:59:37,052 INFO L204 MainTranslator]: Completed translation [2024-11-16 07:59:37,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37 WrapperNode [2024-11-16 07:59:37,053 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 07:59:37,054 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 07:59:37,054 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 07:59:37,054 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 07:59:37,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,082 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-16 07:59:37,083 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 07:59:37,083 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 07:59:37,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 07:59:37,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 07:59:37,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,096 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,107 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]. [2024-11-16 07:59:37,108 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,112 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,116 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 07:59:37,122 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 07:59:37,122 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 07:59:37,122 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 07:59:37,123 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (1/1) ... [2024-11-16 07:59:37,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:59:37,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:37,162 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) [2024-11-16 07:59:37,165 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 [2024-11-16 07:59:37,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 07:59:37,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 07:59:37,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 07:59:37,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 07:59:37,220 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-11-16 07:59:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-11-16 07:59:37,288 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 07:59:37,290 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 07:59:37,406 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: havoc #t~ret4; [2024-11-16 07:59:37,418 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-16 07:59:37,419 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 07:59:37,433 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 07:59:37,434 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 07:59:37,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:59:37 BoogieIcfgContainer [2024-11-16 07:59:37,435 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 07:59:37,437 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 07:59:37,438 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 07:59:37,441 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 07:59:37,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:59:36" (1/3) ... [2024-11-16 07:59:37,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa34c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:59:37, skipping insertion in model container [2024-11-16 07:59:37,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:37" (2/3) ... [2024-11-16 07:59:37,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa34c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:59:37, skipping insertion in model container [2024-11-16 07:59:37,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:59:37" (3/3) ... [2024-11-16 07:59:37,447 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o200.c [2024-11-16 07:59:37,465 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 07:59:37,466 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 07:59:37,523 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 07:59:37,531 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;@2f83abc4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 07:59:37,532 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 07:59:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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) [2024-11-16 07:59:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 07:59:37,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:37,548 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:37,549 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:37,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:37,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1886413104, now seen corresponding path program 1 times [2024-11-16 07:59:37,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:37,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91579910] [2024-11-16 07:59:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:37,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:59:37,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:37,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91579910] [2024-11-16 07:59:37,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91579910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:59:37,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:59:37,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:59:37,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981780539] [2024-11-16 07:59:37,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:59:37,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:59:37,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:37,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:59:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:59:37,982 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 07:59:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:38,025 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-16 07:59:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:59:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-16 07:59:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:38,035 INFO L225 Difference]: With dead ends: 28 [2024-11-16 07:59:38,036 INFO L226 Difference]: Without dead ends: 16 [2024-11-16 07:59:38,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:59:38,042 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:59:38,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:59:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-16 07:59:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-16 07:59:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 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) [2024-11-16 07:59:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-11-16 07:59:38,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2024-11-16 07:59:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:38,083 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-11-16 07:59:38,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 07:59:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-11-16 07:59:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 07:59:38,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:38,085 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:38,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 07:59:38,086 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:38,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1799886983, now seen corresponding path program 1 times [2024-11-16 07:59:38,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:38,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641600306] [2024-11-16 07:59:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:38,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:38,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 07:59:38,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:38,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641600306] [2024-11-16 07:59:38,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641600306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:38,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291342063] [2024-11-16 07:59:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:38,426 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) [2024-11-16 07:59:38,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 07:59:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:38,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 07:59:38,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 07:59:38,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 07:59:38,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291342063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:38,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:38,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-16 07:59:38,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990003021] [2024-11-16 07:59:38,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:38,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 07:59:38,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:38,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 07:59:38,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-16 07:59:38,749 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:59:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:38,804 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-11-16 07:59:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 07:59:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 17 [2024-11-16 07:59:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:38,806 INFO L225 Difference]: With dead ends: 29 [2024-11-16 07:59:38,806 INFO L226 Difference]: Without dead ends: 22 [2024-11-16 07:59:38,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-16 07:59:38,808 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:59:38,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:59:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-16 07:59:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-16 07:59:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 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) [2024-11-16 07:59:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-16 07:59:38,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2024-11-16 07:59:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:38,822 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-16 07:59:38,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-16 07:59:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-16 07:59:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 07:59:38,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:38,824 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:38,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 07:59:39,028 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 [2024-11-16 07:59:39,029 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:39,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1892917223, now seen corresponding path program 2 times [2024-11-16 07:59:39,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:39,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003893850] [2024-11-16 07:59:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:39,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:39,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:39,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:39,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 07:59:39,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003893850] [2024-11-16 07:59:39,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003893850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136062576] [2024-11-16 07:59:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:59:39,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:39,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:39,409 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) [2024-11-16 07:59:39,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 07:59:39,460 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:59:39,460 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:39,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 07:59:39,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 07:59:39,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 07:59:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136062576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:39,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:39,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-16 07:59:39,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472418411] [2024-11-16 07:59:39,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:39,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 07:59:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 07:59:39,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-16 07:59:39,893 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-16 07:59:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:40,102 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-11-16 07:59:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 07:59:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 29 [2024-11-16 07:59:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:40,104 INFO L225 Difference]: With dead ends: 41 [2024-11-16 07:59:40,104 INFO L226 Difference]: Without dead ends: 34 [2024-11-16 07:59:40,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-11-16 07:59:40,106 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:59:40,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 205 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:59:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-16 07:59:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-16 07:59:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-16 07:59:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-16 07:59:40,114 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2024-11-16 07:59:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:40,114 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-16 07:59:40,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-16 07:59:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-16 07:59:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 07:59:40,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:40,116 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:40,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 07:59:40,317 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 [2024-11-16 07:59:40,317 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:40,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1254058329, now seen corresponding path program 3 times [2024-11-16 07:59:40,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:40,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673924657] [2024-11-16 07:59:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:40,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:40,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:40,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:40,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:40,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:40,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:40,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:41,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:41,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-16 07:59:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673924657] [2024-11-16 07:59:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673924657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714044605] [2024-11-16 07:59:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 07:59:41,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:41,145 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) [2024-11-16 07:59:41,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 07:59:41,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-16 07:59:41,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:41,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-16 07:59:41,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-16 07:59:41,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-16 07:59:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714044605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:42,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:42,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-11-16 07:59:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744725143] [2024-11-16 07:59:42,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:42,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-16 07:59:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:42,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-16 07:59:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2024-11-16 07:59:42,218 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-16 07:59:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:43,197 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2024-11-16 07:59:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-16 07:59:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 53 [2024-11-16 07:59:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:43,199 INFO L225 Difference]: With dead ends: 65 [2024-11-16 07:59:43,200 INFO L226 Difference]: Without dead ends: 58 [2024-11-16 07:59:43,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 07:59:43,205 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 07:59:43,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 463 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 07:59:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-16 07:59:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-16 07:59:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-16 07:59:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2024-11-16 07:59:43,229 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2024-11-16 07:59:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:43,230 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2024-11-16 07:59:43,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2024-11-16 07:59:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2024-11-16 07:59:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-16 07:59:43,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:43,233 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:43,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 07:59:43,433 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 [2024-11-16 07:59:43,434 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:43,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:43,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1679434791, now seen corresponding path program 4 times [2024-11-16 07:59:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:43,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127868425] [2024-11-16 07:59:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:43,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:43,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:44,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:44,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:44,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:44,552 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:44,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:44,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:44,889 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:44,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:45,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:45,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:45,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:45,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:45,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:45,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-16 07:59:45,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:45,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127868425] [2024-11-16 07:59:45,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127868425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:45,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393519639] [2024-11-16 07:59:45,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 07:59:45,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:45,471 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) [2024-11-16 07:59:45,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 07:59:45,541 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 07:59:45,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:45,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-16 07:59:45,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-16 07:59:45,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-16 07:59:48,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393519639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:48,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:48,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-11-16 07:59:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509775483] [2024-11-16 07:59:48,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:48,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-16 07:59:48,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-16 07:59:48,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=4072, Unknown=0, NotChecked=0, Total=4692 [2024-11-16 07:59:48,240 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 37 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2024-11-16 07:59:53,801 WARN L286 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-16 08:00:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:08,798 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2024-11-16 08:00:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-16 08:00:08,799 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 37 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 101 [2024-11-16 08:00:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:08,803 INFO L225 Difference]: With dead ends: 113 [2024-11-16 08:00:08,803 INFO L226 Difference]: Without dead ends: 106 [2024-11-16 08:00:08,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2024-11-16 08:00:08,810 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:08,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1312 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 08:00:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-16 08:00:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-16 08:00:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2024-11-16 08:00:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2024-11-16 08:00:08,835 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2024-11-16 08:00:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:08,835 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2024-11-16 08:00:08,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 37 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2024-11-16 08:00:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2024-11-16 08:00:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-16 08:00:08,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:08,840 INFO L215 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:08,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 08:00:09,042 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 [2024-11-16 08:00:09,042 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:09,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash 453754663, now seen corresponding path program 5 times [2024-11-16 08:00:09,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:09,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170455906] [2024-11-16 08:00:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:09,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:09,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:10,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:10,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:11,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:11,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:12,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:12,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:14,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:14,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:14,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,728 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:16,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:16,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:16,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:16,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:16,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:16,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2024-11-16 08:00:17,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:17,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170455906] [2024-11-16 08:00:17,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170455906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:17,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647617163] [2024-11-16 08:00:17,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 08:00:17,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:17,891 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) [2024-11-16 08:00:17,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 08:00:18,365 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2024-11-16 08:00:18,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:18,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-16 08:00:18,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2024-11-16 08:00:18,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2024-11-16 08:00:26,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647617163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:26,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:26,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2024-11-16 08:00:26,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920073477] [2024-11-16 08:00:26,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:26,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-16 08:00:26,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:26,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-16 08:00:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2252, Invalid=15304, Unknown=0, NotChecked=0, Total=17556 [2024-11-16 08:00:26,958 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 133 states, 133 states have (on average 1.0526315789473684) internal successors, (140), 69 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 64 states have return successors, (64), 64 states have call predecessors, (64), 1 states have call successors, (64) [2024-11-16 08:01:03,425 WARN L286 SmtUtils]: Spent 34.71s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)