./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/mapavg1.i --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/array-crafted/mapavg1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9597042154fc2fc3c1808d4beed7ae6070061c42e65231c1781a660590e51714 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:20:33,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:20:33,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:20:33,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:20:33,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:20:33,718 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:20:33,720 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:20:33,720 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:20:33,720 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:20:33,721 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:20:33,721 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:20:33,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:20:33,722 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:20:33,722 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:20:33,722 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:20:33,722 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:20:33,722 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:20:33,723 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:20:33,723 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:20:33,724 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:20:33,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:20:33,725 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:20:33,725 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:20:33,725 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:20:33,725 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:20:33,725 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 -> 9597042154fc2fc3c1808d4beed7ae6070061c42e65231c1781a660590e51714 [2025-03-03 09:20:33,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:20:33,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:20:33,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:20:33,965 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:20:33,966 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:20:33,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg1.i [2025-03-03 09:20:35,105 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f767fcca/b547f5d1577444799c2c278e0c56ca02/FLAG410537279 [2025-03-03 09:20:35,314 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:20:35,321 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i [2025-03-03 09:20:35,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f767fcca/b547f5d1577444799c2c278e0c56ca02/FLAG410537279 [2025-03-03 09:20:35,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f767fcca/b547f5d1577444799c2c278e0c56ca02 [2025-03-03 09:20:35,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:20:35,676 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:20:35,677 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:20:35,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:20:35,681 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:20:35,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c75fcdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35, skipping insertion in model container [2025-03-03 09:20:35,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,694 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:20:35,799 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2025-03-03 09:20:35,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:20:35,808 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:20:35,820 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2025-03-03 09:20:35,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:20:35,832 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:20:35,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35 WrapperNode [2025-03-03 09:20:35,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:20:35,834 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:20:35,834 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:20:35,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:20:35,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,842 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,854 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2025-03-03 09:20:35,854 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:20:35,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:20:35,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:20:35,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:20:35,860 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,863 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,872 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2025-03-03 09:20:35,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,876 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,876 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,877 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,878 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:20:35,879 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:20:35,879 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:20:35,879 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:20:35,880 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (1/1) ... [2025-03-03 09:20:35,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:20:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:35,905 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 09:20:35,909 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 09:20:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:20:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:20:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:20:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:20:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:20:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:20:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:20:35,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:20:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:20:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:20:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2025-03-03 09:20:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2025-03-03 09:20:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:20:35,976 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:20:35,978 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:20:36,062 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L31: call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset; [2025-03-03 09:20:36,080 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-03-03 09:20:36,081 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:20:36,086 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:20:36,086 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:20:36,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:20:36 BoogieIcfgContainer [2025-03-03 09:20:36,087 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:20:36,088 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:20:36,088 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:20:36,092 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:20:36,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:20:35" (1/3) ... [2025-03-03 09:20:36,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfe4354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:20:36, skipping insertion in model container [2025-03-03 09:20:36,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:20:35" (2/3) ... [2025-03-03 09:20:36,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfe4354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:20:36, skipping insertion in model container [2025-03-03 09:20:36,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:20:36" (3/3) ... [2025-03-03 09:20:36,094 INFO L128 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2025-03-03 09:20:36,104 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:20:36,106 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mapavg1.i that has 2 procedures, 21 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 09:20:36,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:20:36,153 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;@26a3c3da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:20:36,154 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:20:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 09:20:36,161 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:36,162 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:36,162 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:36,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash -871894356, now seen corresponding path program 1 times [2025-03-03 09:20:36,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:36,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101296889] [2025-03-03 09:20:36,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:20:36,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:36,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 09:20:36,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 09:20:36,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:36,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:20:36,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101296889] [2025-03-03 09:20:36,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101296889] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:20:36,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:20:36,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:20:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802345330] [2025-03-03 09:20:36,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:20:36,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:20:36,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:36,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:20:36,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:20:36,436 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 09:20:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:36,463 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2025-03-03 09:20:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:20:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2025-03-03 09:20:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:36,469 INFO L225 Difference]: With dead ends: 40 [2025-03-03 09:20:36,470 INFO L226 Difference]: Without dead ends: 18 [2025-03-03 09:20:36,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:20:36,474 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:36,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-03 09:20:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-03 09:20:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 09:20:36,498 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2025-03-03 09:20:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:36,498 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 09:20:36,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 09:20:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 09:20:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 09:20:36,500 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:36,500 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:36,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:20:36,500 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:36,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:36,501 INFO L85 PathProgramCache]: Analyzing trace with hash -753694787, now seen corresponding path program 1 times [2025-03-03 09:20:36,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:36,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354883242] [2025-03-03 09:20:36,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:20:36,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:36,520 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 09:20:36,528 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 09:20:36,529 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:36,529 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:20:36,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:36,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354883242] [2025-03-03 09:20:36,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354883242] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:36,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678353894] [2025-03-03 09:20:36,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:20:36,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:36,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:36,649 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 09:20:36,651 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 09:20:36,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 09:20:36,718 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 09:20:36,718 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:36,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:36,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 09:20:36,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 09:20:36,750 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:20:36,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678353894] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:20:36,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:20:36,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 09:20:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874769805] [2025-03-03 09:20:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:20:36,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:20:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:36,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:20:36,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:20:36,753 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 09:20:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:36,762 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2025-03-03 09:20:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:20:36,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-03 09:20:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:36,763 INFO L225 Difference]: With dead ends: 32 [2025-03-03 09:20:36,763 INFO L226 Difference]: Without dead ends: 19 [2025-03-03 09:20:36,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:20:36,764 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:36,764 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-03 09:20:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-03 09:20:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-03-03 09:20:36,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2025-03-03 09:20:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:36,767 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-03-03 09:20:36,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 09:20:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-03-03 09:20:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-03 09:20:36,768 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:36,768 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:36,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 09:20:36,968 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 09:20:36,969 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:36,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:36,969 INFO L85 PathProgramCache]: Analyzing trace with hash 319447963, now seen corresponding path program 1 times [2025-03-03 09:20:36,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:36,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833477208] [2025-03-03 09:20:36,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:20:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:36,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-03 09:20:36,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 09:20:36,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:36,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 09:20:37,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833477208] [2025-03-03 09:20:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833477208] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510829973] [2025-03-03 09:20:37,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:20:37,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:37,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:37,099 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 09:20:37,100 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 09:20:37,138 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-03 09:20:37,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-03 09:20:37,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:37,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:37,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 09:20:37,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-03 09:20:37,180 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:20:37,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510829973] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:20:37,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:20:37,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 09:20:37,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189337265] [2025-03-03 09:20:37,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:20:37,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:20:37,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:37,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:20:37,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:20:37,181 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 09:20:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:37,192 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2025-03-03 09:20:37,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:20:37,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2025-03-03 09:20:37,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:37,193 INFO L225 Difference]: With dead ends: 30 [2025-03-03 09:20:37,194 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 09:20:37,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:20:37,194 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:37,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 09:20:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-03 09:20:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-03-03 09:20:37,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 28 [2025-03-03 09:20:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:37,201 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-03-03 09:20:37,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 09:20:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-03-03 09:20:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 09:20:37,202 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:37,203 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:37,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:20:37,406 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 09:20:37,406 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:37,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1391912268, now seen corresponding path program 1 times [2025-03-03 09:20:37,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:37,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625865615] [2025-03-03 09:20:37,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:20:37,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:37,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 09:20:37,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 09:20:37,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:37,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 09:20:37,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:37,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625865615] [2025-03-03 09:20:37,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625865615] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:37,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352618031] [2025-03-03 09:20:37,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:20:37,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:37,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:37,490 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 09:20:37,492 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 09:20:37,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 09:20:37,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 09:20:37,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:37,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:37,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:20:37,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 09:20:37,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 09:20:37,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352618031] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:37,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:37,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 09:20:37,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823169861] [2025-03-03 09:20:37,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:37,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 09:20:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:37,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 09:20:37,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:20:37,631 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:37,643 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2025-03-03 09:20:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:20:37,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 29 [2025-03-03 09:20:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:37,644 INFO L225 Difference]: With dead ends: 39 [2025-03-03 09:20:37,644 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 09:20:37,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:20:37,645 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:37,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 09:20:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-03 09:20:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2025-03-03 09:20:37,650 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2025-03-03 09:20:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:37,650 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2025-03-03 09:20:37,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2025-03-03 09:20:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 09:20:37,651 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:37,651 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:37,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 09:20:37,851 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 09:20:37,852 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:37,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash 739990779, now seen corresponding path program 2 times [2025-03-03 09:20:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:37,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330973057] [2025-03-03 09:20:37,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:20:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:37,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-03 09:20:37,882 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:20:37,883 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:20:37,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:20:37,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:37,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330973057] [2025-03-03 09:20:37,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330973057] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:37,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062679107] [2025-03-03 09:20:37,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:20:37,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:37,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:37,943 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 09:20:37,944 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 09:20:37,985 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-03 09:20:38,009 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:20:38,010 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:20:38,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:38,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:20:38,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 09:20:38,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-03 09:20:38,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062679107] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:38,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:38,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2025-03-03 09:20:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870129618] [2025-03-03 09:20:38,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:38,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:20:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:38,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:20:38,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:20:38,131 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:20:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:38,156 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2025-03-03 09:20:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 09:20:38,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2025-03-03 09:20:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:38,157 INFO L225 Difference]: With dead ends: 46 [2025-03-03 09:20:38,157 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 09:20:38,158 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:20:38,158 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:38,158 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 09:20:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-03 09:20:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2025-03-03 09:20:38,161 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 32 [2025-03-03 09:20:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:38,161 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2025-03-03 09:20:38,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:20:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2025-03-03 09:20:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 09:20:38,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:38,162 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:38,168 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 09:20:38,362 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 09:20:38,363 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:38,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:38,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1065502521, now seen corresponding path program 3 times [2025-03-03 09:20:38,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:38,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003528136] [2025-03-03 09:20:38,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:20:38,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:38,382 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 6 equivalence classes. [2025-03-03 09:20:38,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 41 statements. [2025-03-03 09:20:38,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-03 09:20:38,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 09:20:38,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:38,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003528136] [2025-03-03 09:20:38,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003528136] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:38,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682282494] [2025-03-03 09:20:38,474 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:20:38,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:38,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:38,475 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 09:20:38,477 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 09:20:38,523 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 6 equivalence classes. [2025-03-03 09:20:38,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 41 statements. [2025-03-03 09:20:38,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-03 09:20:38,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:38,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 09:20:38,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 09:20:38,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 09:20:38,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682282494] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:38,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:38,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-03 09:20:38,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258028744] [2025-03-03 09:20:38,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:38,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 09:20:38,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:38,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 09:20:38,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-03 09:20:38,591 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 09:20:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:38,605 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2025-03-03 09:20:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 09:20:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2025-03-03 09:20:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:38,607 INFO L225 Difference]: With dead ends: 50 [2025-03-03 09:20:38,607 INFO L226 Difference]: Without dead ends: 34 [2025-03-03 09:20:38,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-03 09:20:38,608 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:38,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-03 09:20:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-03-03 09:20:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2025-03-03 09:20:38,611 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 41 [2025-03-03 09:20:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:38,612 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2025-03-03 09:20:38,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 09:20:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2025-03-03 09:20:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 09:20:38,612 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:38,613 INFO L218 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:38,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 09:20:38,813 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 09:20:38,813 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:38,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash 571879865, now seen corresponding path program 4 times [2025-03-03 09:20:38,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:38,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729413918] [2025-03-03 09:20:38,814 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:20:38,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:38,825 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 09:20:38,844 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 09:20:38,844 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:20:38,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 09:20:39,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:39,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729413918] [2025-03-03 09:20:39,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729413918] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:39,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194188335] [2025-03-03 09:20:39,071 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:20:39,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:39,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:39,073 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 09:20:39,074 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 09:20:39,134 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 09:20:39,164 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-03 09:20:39,165 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:20:39,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:39,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 09:20:39,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 09:20:39,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-03-03 09:20:39,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194188335] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:39,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:39,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-03 09:20:39,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498552774] [2025-03-03 09:20:39,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:39,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 09:20:39,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:39,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 09:20:39,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 09:20:39,360 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:39,388 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2025-03-03 09:20:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 09:20:39,389 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 53 [2025-03-03 09:20:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:39,390 INFO L225 Difference]: With dead ends: 67 [2025-03-03 09:20:39,390 INFO L226 Difference]: Without dead ends: 46 [2025-03-03 09:20:39,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 09:20:39,391 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:39,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-03 09:20:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-03-03 09:20:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2025-03-03 09:20:39,395 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 53 [2025-03-03 09:20:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:39,395 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2025-03-03 09:20:39,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2025-03-03 09:20:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 09:20:39,396 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:39,396 INFO L218 NwaCegarLoop]: trace histogram [22, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:39,405 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 09:20:39,596 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 09:20:39,597 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:39,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:39,597 INFO L85 PathProgramCache]: Analyzing trace with hash 609228025, now seen corresponding path program 5 times [2025-03-03 09:20:39,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:39,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124558186] [2025-03-03 09:20:39,597 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:20:39,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:39,612 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 12 equivalence classes. [2025-03-03 09:20:39,701 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 54 of 65 statements. [2025-03-03 09:20:39,701 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 09:20:39,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2025-03-03 09:20:39,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:39,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124558186] [2025-03-03 09:20:39,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124558186] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:39,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060269500] [2025-03-03 09:20:39,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:20:39,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:39,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:39,767 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 09:20:39,768 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 09:20:39,821 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 12 equivalence classes. [2025-03-03 09:20:40,516 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 54 of 65 statements. [2025-03-03 09:20:40,516 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 09:20:40,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:40,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:20:40,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2025-03-03 09:20:40,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2025-03-03 09:20:40,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060269500] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:40,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:40,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-03-03 09:20:40,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267277505] [2025-03-03 09:20:40,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:40,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 09:20:40,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:40,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 09:20:40,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:20:40,564 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:20:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:40,573 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2025-03-03 09:20:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:20:40,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2025-03-03 09:20:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:40,574 INFO L225 Difference]: With dead ends: 64 [2025-03-03 09:20:40,574 INFO L226 Difference]: Without dead ends: 49 [2025-03-03 09:20:40,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:20:40,575 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:40,575 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-03 09:20:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-03-03 09:20:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2025-03-03 09:20:40,579 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 65 [2025-03-03 09:20:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:40,579 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2025-03-03 09:20:40,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:20:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2025-03-03 09:20:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-03 09:20:40,580 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:40,580 INFO L218 NwaCegarLoop]: trace histogram [22, 18, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:40,588 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 09:20:40,781 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 09:20:40,781 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:40,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash -241379764, now seen corresponding path program 6 times [2025-03-03 09:20:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:40,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729471123] [2025-03-03 09:20:40,781 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:20:40,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:40,795 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 12 equivalence classes. [2025-03-03 09:20:40,838 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 44 of 68 statements. [2025-03-03 09:20:40,839 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 09:20:40,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2025-03-03 09:20:40,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:40,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729471123] [2025-03-03 09:20:40,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729471123] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:40,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730378333] [2025-03-03 09:20:40,930 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:20:40,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:40,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:40,932 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 09:20:40,933 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 09:20:40,995 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 12 equivalence classes. [2025-03-03 09:20:41,161 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 44 of 68 statements. [2025-03-03 09:20:41,162 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 09:20:41,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:41,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:20:41,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 104 proven. 10 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2025-03-03 09:20:41,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2025-03-03 09:20:41,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730378333] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:41,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:41,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-03 09:20:41,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576393339] [2025-03-03 09:20:41,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:41,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:20:41,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:41,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:20:41,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:20:41,253 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:20:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:41,276 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2025-03-03 09:20:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 09:20:41,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2025-03-03 09:20:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:41,277 INFO L225 Difference]: With dead ends: 70 [2025-03-03 09:20:41,277 INFO L226 Difference]: Without dead ends: 55 [2025-03-03 09:20:41,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:20:41,278 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:41,278 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-03 09:20:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-03-03 09:20:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2025-03-03 09:20:41,283 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 68 [2025-03-03 09:20:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:41,283 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2025-03-03 09:20:41,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:20:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2025-03-03 09:20:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-03 09:20:41,284 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:41,284 INFO L218 NwaCegarLoop]: trace histogram [22, 18, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:41,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 09:20:41,484 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 09:20:41,485 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:41,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:41,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1179608876, now seen corresponding path program 7 times [2025-03-03 09:20:41,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:41,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845771581] [2025-03-03 09:20:41,485 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:20:41,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:41,504 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 74 statements into 1 equivalence classes. [2025-03-03 09:20:41,528 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 74 of 74 statements. [2025-03-03 09:20:41,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:41,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-03 09:20:42,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:42,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845771581] [2025-03-03 09:20:42,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845771581] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:42,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007434570] [2025-03-03 09:20:42,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:20:42,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:42,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:42,067 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 09:20:42,069 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 09:20:42,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 74 statements into 1 equivalence classes. [2025-03-03 09:20:42,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 74 of 74 statements. [2025-03-03 09:20:42,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:20:42,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:42,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 09:20:42,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-03 09:20:42,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-03 09:20:42,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007434570] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:42,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:42,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-03-03 09:20:42,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847971970] [2025-03-03 09:20:42,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:42,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 09:20:42,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:42,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 09:20:42,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 09:20:42,877 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:42,926 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2025-03-03 09:20:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-03 09:20:42,926 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 74 [2025-03-03 09:20:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:42,927 INFO L225 Difference]: With dead ends: 109 [2025-03-03 09:20:42,927 INFO L226 Difference]: Without dead ends: 79 [2025-03-03 09:20:42,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 09:20:42,929 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:42,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-03 09:20:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-03-03 09:20:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2025-03-03 09:20:42,936 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 74 [2025-03-03 09:20:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:42,937 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2025-03-03 09:20:42,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2025-03-03 09:20:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-03 09:20:42,938 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:42,939 INFO L218 NwaCegarLoop]: trace histogram [46, 18, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:42,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 09:20:43,139 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 09:20:43,139 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:43,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1554018132, now seen corresponding path program 8 times [2025-03-03 09:20:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:43,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7272594] [2025-03-03 09:20:43,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:20:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:43,166 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 98 statements into 2 equivalence classes. [2025-03-03 09:20:43,187 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 09:20:43,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:20:43,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1355 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-03 09:20:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7272594] [2025-03-03 09:20:44,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7272594] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185814660] [2025-03-03 09:20:44,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:20:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:44,743 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 09:20:44,744 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 09:20:44,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 98 statements into 2 equivalence classes. [2025-03-03 09:20:44,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 09:20:44,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:20:44,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:44,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-03 09:20:44,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1355 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-03 09:20:44,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1355 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2025-03-03 09:20:46,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185814660] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:46,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:46,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2025-03-03 09:20:46,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886544708] [2025-03-03 09:20:46,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:46,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-03-03 09:20:46,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:46,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-03-03 09:20:46,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2025-03-03 09:20:46,926 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:47,015 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2025-03-03 09:20:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-03-03 09:20:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 98 [2025-03-03 09:20:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:47,016 INFO L225 Difference]: With dead ends: 157 [2025-03-03 09:20:47,016 INFO L226 Difference]: Without dead ends: 127 [2025-03-03 09:20:47,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2025-03-03 09:20:47,018 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:47,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:20:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-03-03 09:20:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2025-03-03 09:20:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2025-03-03 09:20:47,025 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 98 [2025-03-03 09:20:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:47,025 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2025-03-03 09:20:47,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2025-03-03 09:20:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-03 09:20:47,026 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:47,026 INFO L218 NwaCegarLoop]: trace histogram [94, 18, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:47,033 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 09:20:47,227 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 09:20:47,227 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:47,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1886544812, now seen corresponding path program 9 times [2025-03-03 09:20:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207608865] [2025-03-03 09:20:47,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:20:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:47,262 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 146 statements into 48 equivalence classes. [2025-03-03 09:20:47,294 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 38 of 146 statements. [2025-03-03 09:20:47,294 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 09:20:47,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4739 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 4616 trivial. 0 not checked. [2025-03-03 09:20:47,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207608865] [2025-03-03 09:20:47,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207608865] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356747646] [2025-03-03 09:20:47,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:20:47,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:47,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:47,380 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 09:20:47,382 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 09:20:47,507 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 146 statements into 48 equivalence classes. [2025-03-03 09:20:47,534 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 38 of 146 statements. [2025-03-03 09:20:47,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 09:20:47,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:47,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:20:47,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4739 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 4616 trivial. 0 not checked. [2025-03-03 09:20:47,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4739 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 4616 trivial. 0 not checked. [2025-03-03 09:20:47,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356747646] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:47,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:47,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-03 09:20:47,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547781946] [2025-03-03 09:20:47,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:47,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 09:20:47,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:47,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 09:20:47,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-03-03 09:20:47,627 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 09:20:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:47,644 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2025-03-03 09:20:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 09:20:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 146 [2025-03-03 09:20:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:47,645 INFO L225 Difference]: With dead ends: 164 [2025-03-03 09:20:47,646 INFO L226 Difference]: Without dead ends: 135 [2025-03-03 09:20:47,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-03-03 09:20:47,647 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:47,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:20:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2025-03-03 09:20:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2025-03-03 09:20:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2025-03-03 09:20:47,659 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 146 [2025-03-03 09:20:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:47,659 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2025-03-03 09:20:47,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 09:20:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2025-03-03 09:20:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2025-03-03 09:20:47,660 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:47,660 INFO L218 NwaCegarLoop]: trace histogram [94, 42, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:47,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 09:20:47,860 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 09:20:47,861 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:47,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:47,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1600941996, now seen corresponding path program 10 times [2025-03-03 09:20:47,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:47,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17032196] [2025-03-03 09:20:47,861 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:20:47,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:47,896 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 170 statements into 2 equivalence classes. [2025-03-03 09:20:47,946 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 170 of 170 statements. [2025-03-03 09:20:47,946 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:20:47,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2025-03-03 09:20:51,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:51,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17032196] [2025-03-03 09:20:51,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17032196] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:51,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756040855] [2025-03-03 09:20:51,973 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:20:51,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:51,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:51,974 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 09:20:51,975 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 09:20:52,131 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 170 statements into 2 equivalence classes. [2025-03-03 09:20:52,251 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 170 of 170 statements. [2025-03-03 09:20:52,251 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:20:52,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:52,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-03-03 09:20:52,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:20:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2025-03-03 09:20:52,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:20:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2025-03-03 09:20:55,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756040855] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:20:55,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:20:55,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 103 [2025-03-03 09:20:55,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222108536] [2025-03-03 09:20:55,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:20:55,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2025-03-03 09:20:55,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:20:55,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2025-03-03 09:20:55,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2025-03-03 09:20:55,124 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 103 states, 103 states have (on average 1.174757281553398) internal successors, (121), 103 states have internal predecessors, (121), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:20:55,219 INFO L93 Difference]: Finished difference Result 179 states and 192 transitions. [2025-03-03 09:20:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2025-03-03 09:20:55,220 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.174757281553398) internal successors, (121), 103 states have internal predecessors, (121), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 170 [2025-03-03 09:20:55,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:20:55,221 INFO L225 Difference]: With dead ends: 179 [2025-03-03 09:20:55,221 INFO L226 Difference]: Without dead ends: 141 [2025-03-03 09:20:55,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 244 SyntacticMatches, 90 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2025-03-03 09:20:55,223 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:20:55,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 164 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:20:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-03 09:20:55,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2025-03-03 09:20:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:20:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2025-03-03 09:20:55,234 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 170 [2025-03-03 09:20:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:20:55,234 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2025-03-03 09:20:55,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.174757281553398) internal successors, (121), 103 states have internal predecessors, (121), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:20:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2025-03-03 09:20:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-03-03 09:20:55,236 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:20:55,236 INFO L218 NwaCegarLoop]: trace histogram [100, 42, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:20:55,243 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 09:20:55,436 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 09:20:55,436 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:20:55,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:20:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1379047924, now seen corresponding path program 11 times [2025-03-03 09:20:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:20:55,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599304358] [2025-03-03 09:20:55,437 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:20:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:20:55,470 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 176 statements into 51 equivalence classes. [2025-03-03 09:20:56,487 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) and asserted 165 of 176 statements. [2025-03-03 09:20:56,487 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2025-03-03 09:20:56,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:20:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6104 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 5545 trivial. 0 not checked. [2025-03-03 09:20:56,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:20:56,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599304358] [2025-03-03 09:20:56,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599304358] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:20:56,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123185891] [2025-03-03 09:20:56,812 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:20:56,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:20:56,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:20:56,814 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 09:20:56,815 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 09:20:56,983 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 176 statements into 51 equivalence classes.