./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/partial_mod_count_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-programs/partial_mod_count_3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8f602fe3f26a1a48cfc4520a058a139a989329a9c65c27b1560937231a92c27 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:18:19,697 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:18:19,743 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:18:19,746 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:18:19,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:18:19,759 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:18:19,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:18:19,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:18:19,760 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:18:19,760 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:18:19,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:18:19,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:18:19,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:18:19,761 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:18:19,761 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:18:19,761 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:18:19,761 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:18:19,761 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:18:19,761 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:18:19,761 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:18:19,762 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:18:19,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:18:19,763 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:18:19,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:18:19,763 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 -> a8f602fe3f26a1a48cfc4520a058a139a989329a9c65c27b1560937231a92c27 [2025-03-03 09:18:19,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:18:19,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:18:19,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:18:19,982 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:18:19,982 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:18:19,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_3.c [2025-03-03 09:18:21,112 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b287bb927/6150d45246814f5fb2579efa67cadb90/FLAG3794fd77b [2025-03-03 09:18:21,331 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:18:21,334 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_3.c [2025-03-03 09:18:21,344 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b287bb927/6150d45246814f5fb2579efa67cadb90/FLAG3794fd77b [2025-03-03 09:18:21,681 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b287bb927/6150d45246814f5fb2579efa67cadb90 [2025-03-03 09:18:21,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:18:21,684 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:18:21,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:18:21,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:18:21,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:18:21,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75254f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21, skipping insertion in model container [2025-03-03 09:18:21,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,697 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:18:21,782 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-programs/partial_mod_count_3.c[323,336] [2025-03-03 09:18:21,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:18:21,803 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:18:21,811 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-programs/partial_mod_count_3.c[323,336] [2025-03-03 09:18:21,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:18:21,828 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:18:21,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21 WrapperNode [2025-03-03 09:18:21,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:18:21,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:18:21,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:18:21,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:18:21,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,842 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,854 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2025-03-03 09:18:21,855 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:18:21,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:18:21,856 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:18:21,856 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:18:21,860 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,862 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,876 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-03 09:18:21,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,880 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,882 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,882 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,883 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:18:21,887 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:18:21,888 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:18:21,888 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:18:21,888 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (1/1) ... [2025-03-03 09:18:21,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:18:21,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:21,913 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 09:18:21,916 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 09:18:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:18:21,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:18:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:18:21,988 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:18:21,990 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:18:22,103 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L8: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-03 09:18:22,110 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-03 09:18:22,110 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:18:22,116 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:18:22,118 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:18:22,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:18:22 BoogieIcfgContainer [2025-03-03 09:18:22,119 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:18:22,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:18:22,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:18:22,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:18:22,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:18:21" (1/3) ... [2025-03-03 09:18:22,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bb2373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:18:22, skipping insertion in model container [2025-03-03 09:18:22,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:18:21" (2/3) ... [2025-03-03 09:18:22,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bb2373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:18:22, skipping insertion in model container [2025-03-03 09:18:22,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:18:22" (3/3) ... [2025-03-03 09:18:22,128 INFO L128 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.c [2025-03-03 09:18:22,141 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:18:22,143 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG partial_mod_count_3.c that has 1 procedures, 15 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 09:18:22,189 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:18:22,197 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;@3119ed37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:18:22,198 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:18:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 09:18:22,206 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:22,206 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:22,207 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:22,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:22,211 INFO L85 PathProgramCache]: Analyzing trace with hash 419935901, now seen corresponding path program 1 times [2025-03-03 09:18:22,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:22,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700494318] [2025-03-03 09:18:22,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:22,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:22,275 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 09:18:22,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 09:18:22,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:22,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:22,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700494318] [2025-03-03 09:18:22,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700494318] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:18:22,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:18:22,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:18:22,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359385210] [2025-03-03 09:18:22,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:18:22,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:18:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:22,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:18:22,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:18:22,455 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:22,521 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2025-03-03 09:18:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 09:18:22,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-03 09:18:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:22,529 INFO L225 Difference]: With dead ends: 38 [2025-03-03 09:18:22,529 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 09:18:22,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:18:22,538 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:22,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:18:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 09:18:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2025-03-03 09:18:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2025-03-03 09:18:22,563 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2025-03-03 09:18:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:22,563 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2025-03-03 09:18:22,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2025-03-03 09:18:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 09:18:22,564 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:22,564 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:22,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:18:22,565 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:22,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1813573396, now seen corresponding path program 1 times [2025-03-03 09:18:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:22,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162207157] [2025-03-03 09:18:22,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:22,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:22,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 09:18:22,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 09:18:22,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:22,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:22,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:22,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162207157] [2025-03-03 09:18:22,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162207157] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:22,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762013876] [2025-03-03 09:18:22,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:22,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:22,693 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 09:18:22,695 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 09:18:22,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 09:18:22,736 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 09:18:22,736 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:22,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:22,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 09:18:22,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:22,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762013876] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:22,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:22,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-03 09:18:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410572328] [2025-03-03 09:18:22,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:22,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 09:18:22,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:22,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 09:18:22,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-03-03 09:18:22,847 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:22,936 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2025-03-03 09:18:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:18:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-03 09:18:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:22,937 INFO L225 Difference]: With dead ends: 54 [2025-03-03 09:18:22,937 INFO L226 Difference]: Without dead ends: 44 [2025-03-03 09:18:22,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-03-03 09:18:22,938 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:22,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:18:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-03 09:18:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 22. [2025-03-03 09:18:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-03 09:18:22,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2025-03-03 09:18:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:22,942 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-03 09:18:22,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-03 09:18:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 09:18:22,959 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:22,959 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:22,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 09:18:23,159 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 09:18:23,160 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:23,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1506026750, now seen corresponding path program 1 times [2025-03-03 09:18:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:23,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533058394] [2025-03-03 09:18:23,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:23,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 09:18:23,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 09:18:23,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:23,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:23,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:23,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533058394] [2025-03-03 09:18:23,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533058394] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:23,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189662162] [2025-03-03 09:18:23,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:23,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:23,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:23,515 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 09:18:23,516 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 09:18:23,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 09:18:23,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 09:18:23,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:23,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:23,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 09:18:23,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:23,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:18:23,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189662162] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:23,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:23,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2025-03-03 09:18:23,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664435074] [2025-03-03 09:18:23,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:23,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 09:18:23,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:23,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 09:18:23,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2025-03-03 09:18:23,760 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:23,954 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2025-03-03 09:18:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 09:18:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-03 09:18:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:23,956 INFO L225 Difference]: With dead ends: 118 [2025-03-03 09:18:23,956 INFO L226 Difference]: Without dead ends: 106 [2025-03-03 09:18:23,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2025-03-03 09:18:23,957 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 216 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:23,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 61 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:18:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-03 09:18:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 40. [2025-03-03 09:18:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-03-03 09:18:23,963 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2025-03-03 09:18:23,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:23,963 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-03-03 09:18:23,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-03-03 09:18:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 09:18:23,964 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:23,964 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:23,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 09:18:24,164 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 09:18:24,164 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:24,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:24,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2535555, now seen corresponding path program 2 times [2025-03-03 09:18:24,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:24,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395777878] [2025-03-03 09:18:24,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:18:24,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:24,176 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-03 09:18:24,179 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 38 statements. [2025-03-03 09:18:24,179 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-03 09:18:24,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-03-03 09:18:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:24,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395777878] [2025-03-03 09:18:24,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395777878] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:18:24,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:18:24,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 09:18:24,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179014618] [2025-03-03 09:18:24,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:18:24,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 09:18:24,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:24,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 09:18:24,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:18:24,250 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:24,302 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2025-03-03 09:18:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:18:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-03 09:18:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:24,303 INFO L225 Difference]: With dead ends: 52 [2025-03-03 09:18:24,303 INFO L226 Difference]: Without dead ends: 50 [2025-03-03 09:18:24,303 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2025-03-03 09:18:24,304 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:24,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 18 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:18:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-03 09:18:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-03 09:18:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2025-03-03 09:18:24,313 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 38 [2025-03-03 09:18:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:24,314 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2025-03-03 09:18:24,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2025-03-03 09:18:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 09:18:24,315 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:24,315 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:24,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-03 09:18:24,315 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:24,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -703059696, now seen corresponding path program 1 times [2025-03-03 09:18:24,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:24,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311011625] [2025-03-03 09:18:24,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:24,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:24,326 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 09:18:24,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:18:24,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:24,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-03 09:18:24,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:24,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311011625] [2025-03-03 09:18:24,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311011625] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:24,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904115431] [2025-03-03 09:18:24,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:18:24,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:24,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:24,784 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 09:18:24,786 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 09:18:24,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 09:18:24,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:18:24,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:18:24,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:24,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-03 09:18:24,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:25,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:25,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904115431] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:25,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:25,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2025-03-03 09:18:25,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375156423] [2025-03-03 09:18:25,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:25,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 09:18:25,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:25,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 09:18:25,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 09:18:25,282 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:25,780 INFO L93 Difference]: Finished difference Result 477 states and 576 transitions. [2025-03-03 09:18:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 09:18:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-03 09:18:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:25,783 INFO L225 Difference]: With dead ends: 477 [2025-03-03 09:18:25,783 INFO L226 Difference]: Without dead ends: 446 [2025-03-03 09:18:25,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=1277, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 09:18:25,784 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 888 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:25,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 126 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:18:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2025-03-03 09:18:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 86. [2025-03-03 09:18:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.188235294117647) internal successors, (101), 85 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2025-03-03 09:18:25,797 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 43 [2025-03-03 09:18:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:25,798 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2025-03-03 09:18:25,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2025-03-03 09:18:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-03 09:18:25,800 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:25,800 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 12, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:18:25,806 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 09:18:26,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:26,001 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:26,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2076116432, now seen corresponding path program 2 times [2025-03-03 09:18:26,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:26,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551688776] [2025-03-03 09:18:26,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:18:26,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:26,021 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-03 09:18:26,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 09:18:26,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:18:26,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2025-03-03 09:18:26,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:26,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551688776] [2025-03-03 09:18:26,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551688776] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:26,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516426471] [2025-03-03 09:18:26,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:18:26,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:26,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:26,526 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 09:18:26,527 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 09:18:26,580 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-03 09:18:26,615 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 09:18:26,615 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:18:26,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:26,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 09:18:26,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:27,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:18:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516426471] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:27,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:27,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 25, 25] total 54 [2025-03-03 09:18:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754521580] [2025-03-03 09:18:27,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:27,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-03 09:18:27,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:27,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-03 09:18:27,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1223, Invalid=1747, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 09:18:27,726 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 55 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 54 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:37,449 INFO L93 Difference]: Finished difference Result 1210 states and 1505 transitions. [2025-03-03 09:18:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2025-03-03 09:18:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 54 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2025-03-03 09:18:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:37,453 INFO L225 Difference]: With dead ends: 1210 [2025-03-03 09:18:37,453 INFO L226 Difference]: Without dead ends: 1161 [2025-03-03 09:18:37,467 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60677 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=35245, Invalid=90425, Unknown=0, NotChecked=0, Total=125670 [2025-03-03 09:18:37,468 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 2038 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2038 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:37,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2038 Valid, 365 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 09:18:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2025-03-03 09:18:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 163. [2025-03-03 09:18:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.1790123456790123) internal successors, (191), 162 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 191 transitions. [2025-03-03 09:18:37,496 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 191 transitions. Word has length 79 [2025-03-03 09:18:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:37,496 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 191 transitions. [2025-03-03 09:18:37,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 54 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 191 transitions. [2025-03-03 09:18:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2025-03-03 09:18:37,498 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:37,498 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 24, 22, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-03 09:18:37,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 09:18:37,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:37,699 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:37,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash -409058307, now seen corresponding path program 3 times [2025-03-03 09:18:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:37,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500859305] [2025-03-03 09:18:37,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:18:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:37,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 156 statements into 47 equivalence classes. [2025-03-03 09:18:37,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 156 statements. [2025-03-03 09:18:37,744 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:18:37,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2025-03-03 09:18:37,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:37,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500859305] [2025-03-03 09:18:37,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500859305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:37,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814319476] [2025-03-03 09:18:37,901 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:18:37,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:37,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:37,903 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 09:18:37,904 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 09:18:37,974 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 156 statements into 47 equivalence classes. [2025-03-03 09:18:37,989 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 156 statements. [2025-03-03 09:18:37,990 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:18:37,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:37,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 09:18:37,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2025-03-03 09:18:38,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2025-03-03 09:18:39,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814319476] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:39,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:39,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-03-03 09:18:39,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815330508] [2025-03-03 09:18:39,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:39,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 09:18:39,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:39,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 09:18:39,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2025-03-03 09:18:39,580 INFO L87 Difference]: Start difference. First operand 163 states and 191 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:39,730 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2025-03-03 09:18:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 09:18:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2025-03-03 09:18:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:39,731 INFO L225 Difference]: With dead ends: 190 [2025-03-03 09:18:39,731 INFO L226 Difference]: Without dead ends: 188 [2025-03-03 09:18:39,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=644, Unknown=0, NotChecked=0, Total=992 [2025-03-03 09:18:39,732 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:39,732 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 44 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:18:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2025-03-03 09:18:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2025-03-03 09:18:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1818181818181819) internal successors, (221), 187 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2025-03-03 09:18:39,753 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 156 [2025-03-03 09:18:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:39,754 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2025-03-03 09:18:39,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2025-03-03 09:18:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2025-03-03 09:18:39,755 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:39,755 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 24, 22, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-03 09:18:39,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 09:18:39,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:39,959 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:39,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1505071920, now seen corresponding path program 4 times [2025-03-03 09:18:39,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:39,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926343034] [2025-03-03 09:18:39,959 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:18:39,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:39,986 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 181 statements into 2 equivalence classes. [2025-03-03 09:18:40,268 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 181 of 181 statements. [2025-03-03 09:18:40,268 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:18:40,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3284 backedges. 133 proven. 2392 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2025-03-03 09:18:42,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:18:42,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926343034] [2025-03-03 09:18:42,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926343034] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:18:42,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54506952] [2025-03-03 09:18:42,131 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:18:42,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:42,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:18:42,132 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 09:18:42,133 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 09:18:42,208 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 181 statements into 2 equivalence classes. [2025-03-03 09:18:45,753 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 181 of 181 statements. [2025-03-03 09:18:45,753 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:18:45,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:18:45,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-03 09:18:45,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:18:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3284 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-03 09:18:46,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:18:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3284 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-03 09:18:48,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54506952] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:18:48,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:18:48,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 49, 49] total 130 [2025-03-03 09:18:48,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035274264] [2025-03-03 09:18:48,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:18:48,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2025-03-03 09:18:48,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:18:48,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2025-03-03 09:18:48,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6205, Invalid=10825, Unknown=0, NotChecked=0, Total=17030 [2025-03-03 09:18:48,942 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 131 states, 131 states have (on average 3.053435114503817) internal successors, (400), 130 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:18:57,297 INFO L93 Difference]: Finished difference Result 5922 states and 7146 transitions. [2025-03-03 09:18:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2025-03-03 09:18:57,297 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.053435114503817) internal successors, (400), 130 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2025-03-03 09:18:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:18:57,313 INFO L225 Difference]: With dead ends: 5922 [2025-03-03 09:18:57,314 INFO L226 Difference]: Without dead ends: 5807 [2025-03-03 09:18:57,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13944 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14938, Invalid=25664, Unknown=0, NotChecked=0, Total=40602 [2025-03-03 09:18:57,318 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 4618 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4618 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-03 09:18:57,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4618 Valid, 586 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-03 09:18:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2025-03-03 09:18:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 404. [2025-03-03 09:18:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.2034739454094292) internal successors, (485), 403 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 485 transitions. [2025-03-03 09:18:57,379 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 485 transitions. Word has length 181 [2025-03-03 09:18:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:18:57,379 INFO L471 AbstractCegarLoop]: Abstraction has 404 states and 485 transitions. [2025-03-03 09:18:57,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.053435114503817) internal successors, (400), 130 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:18:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 485 transitions. [2025-03-03 09:18:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2025-03-03 09:18:57,384 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:18:57,384 INFO L218 NwaCegarLoop]: trace histogram [118, 118, 70, 48, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-03 09:18:57,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 09:18:57,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:18:57,585 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:18:57,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:18:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash 954116432, now seen corresponding path program 5 times [2025-03-03 09:18:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:18:57,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109903509] [2025-03-03 09:18:57,586 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:18:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:18:57,637 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 397 statements into 119 equivalence classes. [2025-03-03 09:19:13,228 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 119 check-sat command(s) and asserted 397 of 397 statements. [2025-03-03 09:19:13,228 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 119 check-sat command(s) [2025-03-03 09:19:13,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:19:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20960 backedges. 7322 proven. 13505 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2025-03-03 09:19:23,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:19:23,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109903509] [2025-03-03 09:19:23,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109903509] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:19:23,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354057063] [2025-03-03 09:19:23,552 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:19:23,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:19:23,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:19:23,554 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 09:19:23,555 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 09:19:23,686 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 397 statements into 119 equivalence classes.