/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/pthread/stack-1.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:47:22,865 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:47:22,907 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 23:47:22,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:47:22,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:47:22,932 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:47:22,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:47:22,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:47:22,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:47:22,933 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:47:22,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:47:22,933 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:47:22,933 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:47:22,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:47:22,935 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:47:22,935 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:47:22,935 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:47:22,935 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:47:22,935 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:47:22,935 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:47:22,935 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:47:22,935 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:47:22,936 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:47:22,936 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:47:22,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:47:22,937 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:47:22,937 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-13 23:47:23,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:47:23,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:47:23,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:47:23,158 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:47:23,160 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:47:23,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2025-04-13 23:47:24,405 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e151953/37452fd064324cbb8c4352dcffa42b76/FLAGb307836e8 [2025-04-13 23:47:24,650 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:47:24,651 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2025-04-13 23:47:24,660 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e151953/37452fd064324cbb8c4352dcffa42b76/FLAGb307836e8 [2025-04-13 23:47:25,407 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e151953/37452fd064324cbb8c4352dcffa42b76 [2025-04-13 23:47:25,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:47:25,410 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:47:25,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:47:25,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:47:25,413 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:47:25,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,414 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324006b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25, skipping insertion in model container [2025-04-13 23:47:25,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,440 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:47:25,690 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2025-04-13 23:47:25,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:47:25,723 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:47:25,757 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2025-04-13 23:47:25,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:47:25,809 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:47:25,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25 WrapperNode [2025-04-13 23:47:25,810 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:47:25,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:47:25,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:47:25,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:47:25,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,847 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2025-04-13 23:47:25,848 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:47:25,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:47:25,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:47:25,848 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:47:25,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,857 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,871 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2025-04-13 23:47:25,871 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,878 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,879 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,880 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,883 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:47:25,884 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:47:25,884 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:47:25,884 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:47:25,884 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (1/1) ... [2025-04-13 23:47:25,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:47:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:25,906 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) [2025-04-13 23:47:25,907 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 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:47:25,923 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:47:25,923 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 23:47:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 23:47:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:47:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:47:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 23:47:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 23:47:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:47:25,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:47:25,925 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 23:47:26,048 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:47:26,050 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:47:26,232 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L986-1: pop_#res#1 := 0; [2025-04-13 23:47:26,233 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L984: havoc pop_#t~mem37#1; [2025-04-13 23:47:26,233 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L984-1: havoc pop_#t~ret36#1; [2025-04-13 23:47:26,234 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:47:26,234 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:47:26,234 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:47:26,467 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:47:26,469 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:47:26,473 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:47:26,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:47:26 BoogieIcfgContainer [2025-04-13 23:47:26,473 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:47:26,474 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:47:26,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:47:26,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:47:26,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:47:25" (1/3) ... [2025-04-13 23:47:26,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5559a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:47:26, skipping insertion in model container [2025-04-13 23:47:26,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:47:25" (2/3) ... [2025-04-13 23:47:26,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5559a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:47:26, skipping insertion in model container [2025-04-13 23:47:26,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:47:26" (3/3) ... [2025-04-13 23:47:26,479 INFO L128 eAbstractionObserver]: Analyzing ICFG stack-1.i [2025-04-13 23:47:26,489 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:47:26,491 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack-1.i that has 3 procedures, 23 locations, 24 edges, 1 initial locations, 2 loop locations, and 2 error locations. [2025-04-13 23:47:26,491 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:47:26,546 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 23:47:26,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2025-04-13 23:47:26,589 INFO L116 PetriNetUnfolderBase]: 4/24 cut-off events. [2025-04-13 23:47:26,592 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:47:26,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 40 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2025-04-13 23:47:26,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2025-04-13 23:47:26,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 22 transitions, 53 flow [2025-04-13 23:47:26,603 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:47:26,611 INFO L340 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;@1e546ecb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:47:26,611 INFO L341 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-04-13 23:47:26,619 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:47:26,619 INFO L116 PetriNetUnfolderBase]: 0/7 cut-off events. [2025-04-13 23:47:26,619 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:47:26,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:26,620 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-04-13 23:47:26,620 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:26,625 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:26,626 INFO L85 PathProgramCache]: Analyzing trace with hash 335280877, now seen corresponding path program 1 times [2025-04-13 23:47:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:26,633 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399448745] [2025-04-13 23:47:26,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:26,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-13 23:47:26,720 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-13 23:47:26,721 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:26,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:26,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:26,866 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399448745] [2025-04-13 23:47:26,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399448745] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:47:26,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:47:26,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 23:47:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876163987] [2025-04-13 23:47:26,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:26,872 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:47:26,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:26,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:47:26,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:47:26,902 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:26,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-04-13 23:47:26,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:26,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:26,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:27,077 INFO L116 PetriNetUnfolderBase]: 206/352 cut-off events. [2025-04-13 23:47:27,077 INFO L117 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-04-13 23:47:27,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 352 events. 206/352 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1209 event pairs, 52 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 690. Up to 263 conditions per place. [2025-04-13 23:47:27,082 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2025-04-13 23:47:27,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 136 flow [2025-04-13 23:47:27,084 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:47:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:47:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2025-04-13 23:47:27,096 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2025-04-13 23:47:27,097 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 53 flow. Second operand 3 states and 42 transitions. [2025-04-13 23:47:27,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 136 flow [2025-04-13 23:47:27,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-13 23:47:27,103 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 58 flow [2025-04-13 23:47:27,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2025-04-13 23:47:27,107 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2025-04-13 23:47:27,107 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 58 flow [2025-04-13 23:47:27,107 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-04-13 23:47:27,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:27,107 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:27,107 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:47:27,107 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:27,108 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1865174608, now seen corresponding path program 1 times [2025-04-13 23:47:27,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:27,108 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446150291] [2025-04-13 23:47:27,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:27,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:27,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 23:47:27,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 23:47:27,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:27,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:27,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:27,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446150291] [2025-04-13 23:47:27,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446150291] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:27,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784938817] [2025-04-13 23:47:27,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:27,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:27,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:27,288 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) [2025-04-13 23:47:27,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 23:47:27,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 23:47:27,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 23:47:27,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:27,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:27,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 23:47:27,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:27,438 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-04-13 23:47:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:27,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:27,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784938817] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:27,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:27,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2025-04-13 23:47:27,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415390489] [2025-04-13 23:47:27,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:27,504 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-13 23:47:27,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:27,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-13 23:47:27,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-04-13 23:47:27,504 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:27,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2025-04-13 23:47:27,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:27,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:27,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:27,853 INFO L116 PetriNetUnfolderBase]: 771/1322 cut-off events. [2025-04-13 23:47:27,853 INFO L117 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2025-04-13 23:47:27,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2901 conditions, 1322 events. 771/1322 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5764 event pairs, 54 based on Foata normal form. 11/1141 useless extension candidates. Maximal degree in co-relation 2517. Up to 270 conditions per place. [2025-04-13 23:47:27,862 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 94 selfloop transitions, 17 changer transitions 2/113 dead transitions. [2025-04-13 23:47:27,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 113 transitions, 506 flow [2025-04-13 23:47:27,864 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 23:47:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 23:47:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2025-04-13 23:47:27,865 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6442307692307693 [2025-04-13 23:47:27,865 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 58 flow. Second operand 8 states and 134 transitions. [2025-04-13 23:47:27,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 113 transitions, 506 flow [2025-04-13 23:47:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 113 transitions, 504 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 23:47:27,867 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 194 flow [2025-04-13 23:47:27,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=194, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2025-04-13 23:47:27,869 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 12 predicate places. [2025-04-13 23:47:27,869 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 194 flow [2025-04-13 23:47:27,869 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2025-04-13 23:47:27,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:27,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:27,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-13 23:47:28,074 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:28,075 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:28,076 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2037938446, now seen corresponding path program 1 times [2025-04-13 23:47:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:28,076 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587182095] [2025-04-13 23:47:28,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:28,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:28,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 23:47:28,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 23:47:28,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:28,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:28,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:28,161 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587182095] [2025-04-13 23:47:28,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587182095] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:47:28,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:47:28,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:47:28,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80951941] [2025-04-13 23:47:28,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:28,162 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:47:28,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:28,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:47:28,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:47:28,163 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:28,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2025-04-13 23:47:28,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:28,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:28,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:28,286 INFO L116 PetriNetUnfolderBase]: 531/934 cut-off events. [2025-04-13 23:47:28,286 INFO L117 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2025-04-13 23:47:28,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 934 events. 531/934 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3961 event pairs, 194 based on Foata normal form. 52/830 useless extension candidates. Maximal degree in co-relation 2011. Up to 505 conditions per place. [2025-04-13 23:47:28,290 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 43 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2025-04-13 23:47:28,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 303 flow [2025-04-13 23:47:28,291 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:47:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:47:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2025-04-13 23:47:28,291 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2025-04-13 23:47:28,291 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 194 flow. Second operand 3 states and 38 transitions. [2025-04-13 23:47:28,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 47 transitions, 303 flow [2025-04-13 23:47:28,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 283 flow, removed 10 selfloop flow, removed 0 redundant places. [2025-04-13 23:47:28,298 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 174 flow [2025-04-13 23:47:28,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2025-04-13 23:47:28,299 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 14 predicate places. [2025-04-13 23:47:28,299 INFO L485 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 174 flow [2025-04-13 23:47:28,299 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2025-04-13 23:47:28,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:28,299 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:28,300 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 23:47:28,300 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:28,300 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash 873680792, now seen corresponding path program 1 times [2025-04-13 23:47:28,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:28,300 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47790389] [2025-04-13 23:47:28,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:28,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:28,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 23:47:28,333 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 23:47:28,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:28,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:28,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:28,710 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47790389] [2025-04-13 23:47:28,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47790389] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:47:28,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:47:28,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 23:47:28,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054762563] [2025-04-13 23:47:28,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:28,710 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 23:47:28,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:28,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 23:47:28,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 23:47:28,711 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:28,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2025-04-13 23:47:28,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:28,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:28,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:28,870 INFO L116 PetriNetUnfolderBase]: 583/1026 cut-off events. [2025-04-13 23:47:28,870 INFO L117 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2025-04-13 23:47:28,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2648 conditions, 1026 events. 583/1026 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4329 event pairs, 149 based on Foata normal form. 7/837 useless extension candidates. Maximal degree in co-relation 2042. Up to 817 conditions per place. [2025-04-13 23:47:28,875 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 54 selfloop transitions, 4 changer transitions 2/60 dead transitions. [2025-04-13 23:47:28,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 365 flow [2025-04-13 23:47:28,876 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 23:47:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 23:47:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2025-04-13 23:47:28,876 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2025-04-13 23:47:28,876 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 174 flow. Second operand 4 states and 54 transitions. [2025-04-13 23:47:28,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 365 flow [2025-04-13 23:47:28,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 60 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 23:47:28,880 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 199 flow [2025-04-13 23:47:28,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2025-04-13 23:47:28,880 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2025-04-13 23:47:28,880 INFO L485 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 199 flow [2025-04-13 23:47:28,880 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2025-04-13 23:47:28,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:28,880 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:28,880 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 23:47:28,881 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:28,883 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:28,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1930910891, now seen corresponding path program 1 times [2025-04-13 23:47:28,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:28,883 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914296045] [2025-04-13 23:47:28,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:28,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:28,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-13 23:47:28,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:47:28,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:28,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:29,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:29,265 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914296045] [2025-04-13 23:47:29,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914296045] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:29,265 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890584568] [2025-04-13 23:47:29,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:29,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:29,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:29,269 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) [2025-04-13 23:47:29,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 23:47:29,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-13 23:47:29,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:47:29,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:29,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:29,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 23:47:29,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:29,390 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2025-04-13 23:47:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 23:47:29,444 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 23:47:29,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890584568] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:47:29,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 23:47:29,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2025-04-13 23:47:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160528279] [2025-04-13 23:47:29,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:29,445 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:47:29,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:29,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:47:29,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:47:29,446 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:29,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2025-04-13 23:47:29,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:29,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:29,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:29,571 INFO L116 PetriNetUnfolderBase]: 612/1081 cut-off events. [2025-04-13 23:47:29,572 INFO L117 PetriNetUnfolderBase]: For 568/568 co-relation queries the response was YES. [2025-04-13 23:47:29,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 1081 events. 612/1081 cut-off events. For 568/568 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4569 event pairs, 134 based on Foata normal form. 7/885 useless extension candidates. Maximal degree in co-relation 2115. Up to 663 conditions per place. [2025-04-13 23:47:29,577 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 41 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2025-04-13 23:47:29,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 321 flow [2025-04-13 23:47:29,578 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:47:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:47:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-04-13 23:47:29,578 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2025-04-13 23:47:29,579 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 199 flow. Second operand 3 states and 41 transitions. [2025-04-13 23:47:29,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 321 flow [2025-04-13 23:47:29,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 310 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-04-13 23:47:29,582 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 220 flow [2025-04-13 23:47:29,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2025-04-13 23:47:29,582 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2025-04-13 23:47:29,582 INFO L485 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 220 flow [2025-04-13 23:47:29,582 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2025-04-13 23:47:29,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:29,582 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:29,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 23:47:29,783 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:29,783 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:29,783 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash -799917542, now seen corresponding path program 1 times [2025-04-13 23:47:29,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:29,784 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621751269] [2025-04-13 23:47:29,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:29,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:29,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-13 23:47:29,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-13 23:47:29,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:29,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:29,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:29,959 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621751269] [2025-04-13 23:47:29,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621751269] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:29,959 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34834006] [2025-04-13 23:47:29,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:29,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:29,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:29,961 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) [2025-04-13 23:47:29,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 23:47:30,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-13 23:47:30,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-13 23:47:30,048 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:30,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:30,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 23:47:30,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:30,066 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-04-13 23:47:30,087 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-04-13 23:47:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:30,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 23:47:30,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34834006] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:30,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 23:47:30,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 10 [2025-04-13 23:47:30,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323321651] [2025-04-13 23:47:30,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:30,401 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 23:47:30,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:30,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 23:47:30,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-04-13 23:47:30,402 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:30,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2025-04-13 23:47:30,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:30,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:30,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:30,623 INFO L116 PetriNetUnfolderBase]: 763/1350 cut-off events. [2025-04-13 23:47:30,623 INFO L117 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2025-04-13 23:47:30,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1350 events. 763/1350 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5969 event pairs, 70 based on Foata normal form. 12/1124 useless extension candidates. Maximal degree in co-relation 2684. Up to 696 conditions per place. [2025-04-13 23:47:30,629 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 50 selfloop transitions, 22 changer transitions 0/72 dead transitions. [2025-04-13 23:47:30,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 72 transitions, 482 flow [2025-04-13 23:47:30,630 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 23:47:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 23:47:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-04-13 23:47:30,631 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2025-04-13 23:47:30,631 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 220 flow. Second operand 5 states and 64 transitions. [2025-04-13 23:47:30,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 72 transitions, 482 flow [2025-04-13 23:47:30,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 72 transitions, 421 flow, removed 2 selfloop flow, removed 8 redundant places. [2025-04-13 23:47:30,635 INFO L231 Difference]: Finished difference. Result has 40 places, 47 transitions, 299 flow [2025-04-13 23:47:30,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=40, PETRI_TRANSITIONS=47} [2025-04-13 23:47:30,636 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2025-04-13 23:47:30,636 INFO L485 AbstractCegarLoop]: Abstraction has has 40 places, 47 transitions, 299 flow [2025-04-13 23:47:30,636 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2025-04-13 23:47:30,636 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:30,636 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:30,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 23:47:30,836 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:30,837 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:30,837 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash -683522888, now seen corresponding path program 1 times [2025-04-13 23:47:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:30,838 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932173978] [2025-04-13 23:47:30,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:30,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:30,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-13 23:47:30,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-13 23:47:30,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:30,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:31,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:31,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932173978] [2025-04-13 23:47:31,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932173978] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:31,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841418146] [2025-04-13 23:47:31,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:31,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:31,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:31,297 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) [2025-04-13 23:47:31,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 23:47:31,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-13 23:47:31,386 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-13 23:47:31,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:31,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:31,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:47:31,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:31,423 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 23:47:31,471 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-04-13 23:47:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:31,581 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:31,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841418146] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:31,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:31,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-04-13 23:47:31,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275112418] [2025-04-13 23:47:31,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:31,902 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:47:31,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:31,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:47:31,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:47:31,903 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:31,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 47 transitions, 299 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2025-04-13 23:47:31,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:31,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:31,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:32,406 INFO L116 PetriNetUnfolderBase]: 1236/2194 cut-off events. [2025-04-13 23:47:32,406 INFO L117 PetriNetUnfolderBase]: For 1471/1471 co-relation queries the response was YES. [2025-04-13 23:47:32,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5611 conditions, 2194 events. 1236/2194 cut-off events. For 1471/1471 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 10264 event pairs, 272 based on Foata normal form. 18/1801 useless extension candidates. Maximal degree in co-relation 4581. Up to 537 conditions per place. [2025-04-13 23:47:32,415 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 88 selfloop transitions, 35 changer transitions 8/131 dead transitions. [2025-04-13 23:47:32,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 131 transitions, 872 flow [2025-04-13 23:47:32,416 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 23:47:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 23:47:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2025-04-13 23:47:32,417 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2025-04-13 23:47:32,417 INFO L175 Difference]: Start difference. First operand has 40 places, 47 transitions, 299 flow. Second operand 9 states and 124 transitions. [2025-04-13 23:47:32,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 131 transitions, 872 flow [2025-04-13 23:47:32,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 131 transitions, 837 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-13 23:47:32,421 INFO L231 Difference]: Finished difference. Result has 52 places, 62 transitions, 533 flow [2025-04-13 23:47:32,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=533, PETRI_PLACES=52, PETRI_TRANSITIONS=62} [2025-04-13 23:47:32,421 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2025-04-13 23:47:32,421 INFO L485 AbstractCegarLoop]: Abstraction has has 52 places, 62 transitions, 533 flow [2025-04-13 23:47:32,421 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2025-04-13 23:47:32,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:32,421 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1] [2025-04-13 23:47:32,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 23:47:32,622 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:32,622 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:32,622 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash -972435591, now seen corresponding path program 2 times [2025-04-13 23:47:32,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:32,623 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890506304] [2025-04-13 23:47:32,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:47:32,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:32,635 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 23:47:32,646 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:47:32,646 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:47:32,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:32,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:32,810 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890506304] [2025-04-13 23:47:32,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890506304] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:32,810 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551735044] [2025-04-13 23:47:32,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:47:32,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:32,812 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) [2025-04-13 23:47:32,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 23:47:32,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 23:47:32,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:47:32,906 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:47:32,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:32,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 23:47:32,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:32,922 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-04-13 23:47:32,959 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-04-13 23:47:32,992 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-04-13 23:47:33,018 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-04-13 23:47:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:33,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:33,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551735044] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:33,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:33,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-04-13 23:47:33,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078138114] [2025-04-13 23:47:33,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:33,114 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-13 23:47:33,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:33,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-13 23:47:33,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2025-04-13 23:47:33,115 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:33,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 62 transitions, 533 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 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) [2025-04-13 23:47:33,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:33,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:33,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:33,757 INFO L116 PetriNetUnfolderBase]: 2445/4327 cut-off events. [2025-04-13 23:47:33,758 INFO L117 PetriNetUnfolderBase]: For 6003/6003 co-relation queries the response was YES. [2025-04-13 23:47:33,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11746 conditions, 4327 events. 2445/4327 cut-off events. For 6003/6003 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 22403 event pairs, 534 based on Foata normal form. 90/3594 useless extension candidates. Maximal degree in co-relation 10317. Up to 816 conditions per place. [2025-04-13 23:47:33,772 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 164 selfloop transitions, 76 changer transitions 10/250 dead transitions. [2025-04-13 23:47:33,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 250 transitions, 1867 flow [2025-04-13 23:47:33,772 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 23:47:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-13 23:47:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 230 transitions. [2025-04-13 23:47:33,774 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5528846153846154 [2025-04-13 23:47:33,774 INFO L175 Difference]: Start difference. First operand has 52 places, 62 transitions, 533 flow. Second operand 16 states and 230 transitions. [2025-04-13 23:47:33,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 250 transitions, 1867 flow [2025-04-13 23:47:33,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 250 transitions, 1847 flow, removed 10 selfloop flow, removed 0 redundant places. [2025-04-13 23:47:33,790 INFO L231 Difference]: Finished difference. Result has 69 places, 108 transitions, 1217 flow [2025-04-13 23:47:33,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1217, PETRI_PLACES=69, PETRI_TRANSITIONS=108} [2025-04-13 23:47:33,792 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 44 predicate places. [2025-04-13 23:47:33,792 INFO L485 AbstractCegarLoop]: Abstraction has has 69 places, 108 transitions, 1217 flow [2025-04-13 23:47:33,792 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 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) [2025-04-13 23:47:33,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:33,792 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1] [2025-04-13 23:47:33,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-13 23:47:33,993 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:33,993 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:33,993 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash 98893020, now seen corresponding path program 3 times [2025-04-13 23:47:33,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:33,994 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441194927] [2025-04-13 23:47:33,994 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:47:33,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:34,005 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 6 equivalence classes. [2025-04-13 23:47:34,027 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 25 of 25 statements. [2025-04-13 23:47:34,027 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:47:34,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:34,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:34,092 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441194927] [2025-04-13 23:47:34,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441194927] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:47:34,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:47:34,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 23:47:34,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494947193] [2025-04-13 23:47:34,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:47:34,092 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:47:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:34,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:47:34,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:47:34,093 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:34,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 108 transitions, 1217 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2025-04-13 23:47:34,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:34,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:34,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:34,625 INFO L116 PetriNetUnfolderBase]: 3229/5616 cut-off events. [2025-04-13 23:47:34,625 INFO L117 PetriNetUnfolderBase]: For 10579/10579 co-relation queries the response was YES. [2025-04-13 23:47:34,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15843 conditions, 5616 events. 3229/5616 cut-off events. For 10579/10579 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 30940 event pairs, 356 based on Foata normal form. 0/4612 useless extension candidates. Maximal degree in co-relation 15508. Up to 3487 conditions per place. [2025-04-13 23:47:34,642 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 154 selfloop transitions, 7 changer transitions 57/218 dead transitions. [2025-04-13 23:47:34,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 218 transitions, 2529 flow [2025-04-13 23:47:34,643 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 23:47:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 23:47:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2025-04-13 23:47:34,644 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2025-04-13 23:47:34,644 INFO L175 Difference]: Start difference. First operand has 69 places, 108 transitions, 1217 flow. Second operand 7 states and 100 transitions. [2025-04-13 23:47:34,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 218 transitions, 2529 flow [2025-04-13 23:47:34,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 218 transitions, 2296 flow, removed 36 selfloop flow, removed 7 redundant places. [2025-04-13 23:47:34,664 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 724 flow [2025-04-13 23:47:34,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2025-04-13 23:47:34,665 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2025-04-13 23:47:34,665 INFO L485 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 724 flow [2025-04-13 23:47:34,665 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2025-04-13 23:47:34,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:34,665 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:34,666 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-13 23:47:34,666 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:34,666 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1254742230, now seen corresponding path program 2 times [2025-04-13 23:47:34,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:34,666 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461726566] [2025-04-13 23:47:34,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:47:34,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:34,678 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-04-13 23:47:34,697 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 23:47:34,697 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:47:34,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 23:47:35,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:35,267 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461726566] [2025-04-13 23:47:35,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461726566] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:35,267 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503707870] [2025-04-13 23:47:35,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:47:35,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:35,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:35,269 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) [2025-04-13 23:47:35,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-13 23:47:35,363 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-04-13 23:47:35,397 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 23:47:35,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:47:35,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:35,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-13 23:47:35,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:35,439 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-04-13 23:47:35,519 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2025-04-13 23:47:35,601 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2025-04-13 23:47:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:36,012 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:36,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503707870] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:36,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:36,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2025-04-13 23:47:36,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593321445] [2025-04-13 23:47:36,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:36,505 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-13 23:47:36,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:36,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-13 23:47:36,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2025-04-13 23:47:36,505 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:36,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 724 flow. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 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) [2025-04-13 23:47:36,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:36,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:36,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:37,815 INFO L116 PetriNetUnfolderBase]: 2570/4718 cut-off events. [2025-04-13 23:47:37,815 INFO L117 PetriNetUnfolderBase]: For 7702/7702 co-relation queries the response was YES. [2025-04-13 23:47:37,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13899 conditions, 4718 events. 2570/4718 cut-off events. For 7702/7702 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 26823 event pairs, 434 based on Foata normal form. 46/4460 useless extension candidates. Maximal degree in co-relation 13007. Up to 958 conditions per place. [2025-04-13 23:47:37,834 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 148 selfloop transitions, 37 changer transitions 113/298 dead transitions. [2025-04-13 23:47:37,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 298 transitions, 2194 flow [2025-04-13 23:47:37,835 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 23:47:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 23:47:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 261 transitions. [2025-04-13 23:47:37,837 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4562937062937063 [2025-04-13 23:47:37,837 INFO L175 Difference]: Start difference. First operand has 65 places, 79 transitions, 724 flow. Second operand 22 states and 261 transitions. [2025-04-13 23:47:37,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 298 transitions, 2194 flow [2025-04-13 23:47:37,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 298 transitions, 2154 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-04-13 23:47:37,849 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 629 flow [2025-04-13 23:47:37,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=629, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2025-04-13 23:47:37,851 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2025-04-13 23:47:37,851 INFO L485 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 629 flow [2025-04-13 23:47:37,851 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 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) [2025-04-13 23:47:37,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:37,851 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:37,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-13 23:47:38,052 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:38,053 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:38,054 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash -658902280, now seen corresponding path program 3 times [2025-04-13 23:47:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:38,054 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971659989] [2025-04-13 23:47:38,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:47:38,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:38,067 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 4 equivalence classes. [2025-04-13 23:47:38,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 35 of 35 statements. [2025-04-13 23:47:38,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-04-13 23:47:38,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 23:47:38,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:38,943 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971659989] [2025-04-13 23:47:38,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971659989] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:38,943 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496178822] [2025-04-13 23:47:38,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:47:38,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:38,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:38,945 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) [2025-04-13 23:47:38,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-13 23:47:39,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 4 equivalence classes. [2025-04-13 23:47:39,107 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 35 of 35 statements. [2025-04-13 23:47:39,108 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-04-13 23:47:39,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:39,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-04-13 23:47:39,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:39,138 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 23:47:39,167 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2025-04-13 23:47:39,205 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2025-04-13 23:47:39,227 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-04-13 23:47:39,272 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2025-04-13 23:47:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:39,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:40,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496178822] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:40,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:40,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2025-04-13 23:47:40,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042219588] [2025-04-13 23:47:40,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:40,362 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-13 23:47:40,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:40,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-13 23:47:40,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2025-04-13 23:47:40,363 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:40,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 629 flow. Second operand has 23 states, 23 states have (on average 6.0) internal successors, (138), 23 states have internal predecessors, (138), 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) [2025-04-13 23:47:40,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:40,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:40,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:41,329 INFO L116 PetriNetUnfolderBase]: 1020/1970 cut-off events. [2025-04-13 23:47:41,329 INFO L117 PetriNetUnfolderBase]: For 3770/3770 co-relation queries the response was YES. [2025-04-13 23:47:41,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5824 conditions, 1970 events. 1020/1970 cut-off events. For 3770/3770 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 9112 event pairs, 138 based on Foata normal form. 29/1947 useless extension candidates. Maximal degree in co-relation 5806. Up to 405 conditions per place. [2025-04-13 23:47:41,334 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 87 selfloop transitions, 19 changer transitions 104/210 dead transitions. [2025-04-13 23:47:41,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 210 transitions, 1495 flow [2025-04-13 23:47:41,334 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 23:47:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 23:47:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 223 transitions. [2025-04-13 23:47:41,335 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4084249084249084 [2025-04-13 23:47:41,335 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 629 flow. Second operand 21 states and 223 transitions. [2025-04-13 23:47:41,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 210 transitions, 1495 flow [2025-04-13 23:47:41,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 210 transitions, 1297 flow, removed 27 selfloop flow, removed 20 redundant places. [2025-04-13 23:47:41,341 INFO L231 Difference]: Finished difference. Result has 89 places, 39 transitions, 261 flow [2025-04-13 23:47:41,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=261, PETRI_PLACES=89, PETRI_TRANSITIONS=39} [2025-04-13 23:47:41,342 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 64 predicate places. [2025-04-13 23:47:41,342 INFO L485 AbstractCegarLoop]: Abstraction has has 89 places, 39 transitions, 261 flow [2025-04-13 23:47:41,342 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.0) internal successors, (138), 23 states have internal predecessors, (138), 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) [2025-04-13 23:47:41,342 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:41,342 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:41,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-13 23:47:41,545 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:41,546 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-13 23:47:41,546 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1472397672, now seen corresponding path program 4 times [2025-04-13 23:47:41,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:41,546 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468605248] [2025-04-13 23:47:41,547 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:47:41,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:41,566 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 43 statements into 2 equivalence classes. [2025-04-13 23:47:41,627 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-04-13 23:47:41,627 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:47:41,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 23:47:42,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:42,558 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468605248] [2025-04-13 23:47:42,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468605248] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:42,558 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911935546] [2025-04-13 23:47:42,559 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:47:42,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:42,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:42,560 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:47:42,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-13 23:47:42,659 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 43 statements into 2 equivalence classes. [2025-04-13 23:47:42,697 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-04-13 23:47:42,697 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:47:42,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:42,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 23:47:42,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:42,732 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-04-13 23:47:42,778 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2025-04-13 23:47:42,848 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2025-04-13 23:47:42,914 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2025-04-13 23:47:43,001 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2025-04-13 23:47:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:43,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911935546] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:44,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:44,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2025-04-13 23:47:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115459080] [2025-04-13 23:47:44,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:44,823 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 23:47:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:44,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 23:47:44,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2025-04-13 23:47:44,824 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2025-04-13 23:47:44,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 39 transitions, 261 flow. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 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) [2025-04-13 23:47:44,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:44,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2025-04-13 23:47:44,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:45,711 INFO L116 PetriNetUnfolderBase]: 362/697 cut-off events. [2025-04-13 23:47:45,711 INFO L117 PetriNetUnfolderBase]: For 1176/1176 co-relation queries the response was YES. [2025-04-13 23:47:45,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 697 events. 362/697 cut-off events. For 1176/1176 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2090 event pairs, 74 based on Foata normal form. 10/707 useless extension candidates. Maximal degree in co-relation 2225. Up to 169 conditions per place. [2025-04-13 23:47:45,713 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2025-04-13 23:47:45,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 673 flow [2025-04-13 23:47:45,713 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 23:47:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 23:47:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 118 transitions. [2025-04-13 23:47:45,714 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3782051282051282 [2025-04-13 23:47:45,714 INFO L175 Difference]: Start difference. First operand has 89 places, 39 transitions, 261 flow. Second operand 12 states and 118 transitions. [2025-04-13 23:47:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 673 flow [2025-04-13 23:47:45,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 98 transitions, 596 flow, removed 21 selfloop flow, removed 15 redundant places. [2025-04-13 23:47:45,716 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2025-04-13 23:47:45,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2025-04-13 23:47:45,717 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2025-04-13 23:47:45,717 INFO L485 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2025-04-13 23:47:45,717 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 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) [2025-04-13 23:47:45,720 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-04-13 23:47:45,720 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2025-04-13 23:47:45,720 INFO L790 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-04-13 23:47:45,720 INFO L790 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-04-13 23:47:45,720 INFO L790 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-04-13 23:47:45,720 INFO L790 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-04-13 23:47:45,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-13 23:47:45,921 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-04-13 23:47:45,921 INFO L422 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1] [2025-04-13 23:47:45,925 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 23:47:45,925 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 23:47:45,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 11:47:45 BasicIcfg [2025-04-13 23:47:45,928 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 23:47:45,928 INFO L158 Benchmark]: Toolchain (without parser) took 20518.41ms. Allocated memory was 142.6MB in the beginning and 604.0MB in the end (delta: 461.4MB). Free memory was 99.4MB in the beginning and 523.4MB in the end (delta: -424.0MB). Peak memory consumption was 378.0MB. Max. memory is 8.0GB. [2025-04-13 23:47:45,928 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 159.4MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 23:47:45,928 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.50ms. Allocated memory is still 142.6MB. Free memory was 98.8MB in the beginning and 66.3MB in the end (delta: 32.5MB). Peak memory consumption was 33.6MB. Max. memory is 8.0GB. [2025-04-13 23:47:45,928 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.22ms. Allocated memory is still 142.6MB. Free memory was 66.3MB in the beginning and 64.0MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 23:47:45,929 INFO L158 Benchmark]: Boogie Preprocessor took 35.14ms. Allocated memory is still 142.6MB. Free memory was 64.0MB in the beginning and 62.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 23:47:45,929 INFO L158 Benchmark]: IcfgBuilder took 589.22ms. Allocated memory is still 142.6MB. Free memory was 61.4MB in the beginning and 78.5MB in the end (delta: -17.1MB). Peak memory consumption was 44.8MB. Max. memory is 8.0GB. [2025-04-13 23:47:45,929 INFO L158 Benchmark]: TraceAbstraction took 19453.60ms. Allocated memory was 142.6MB in the beginning and 604.0MB in the end (delta: 461.4MB). Free memory was 77.8MB in the beginning and 523.4MB in the end (delta: -445.5MB). Peak memory consumption was 354.1MB. Max. memory is 8.0GB. [2025-04-13 23:47:45,930 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 159.4MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 399.50ms. Allocated memory is still 142.6MB. Free memory was 98.8MB in the beginning and 66.3MB in the end (delta: 32.5MB). Peak memory consumption was 33.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.22ms. Allocated memory is still 142.6MB. Free memory was 66.3MB in the beginning and 64.0MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.14ms. Allocated memory is still 142.6MB. Free memory was 64.0MB in the beginning and 62.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 589.22ms. Allocated memory is still 142.6MB. Free memory was 61.4MB in the beginning and 78.5MB in the end (delta: -17.1MB). Peak memory consumption was 44.8MB. Max. memory is 8.0GB. * TraceAbstraction took 19453.60ms. Allocated memory was 142.6MB in the beginning and 604.0MB in the end (delta: 461.4MB). Free memory was 77.8MB in the beginning and 523.4MB in the end (delta: -445.5MB). Peak memory consumption was 354.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 46 edges, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.4s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1613 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1613 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 155 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3679 IncrementalHoareTripleChecker+Invalid, 3834 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 155 mSolverCounterUnsat, 0 mSDtfsCounter, 3679 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 316 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1217occurred in iteration=8, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 427 NumberOfCodeBlocks, 427 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 573 ConstructedInterpolants, 7 QuantifiedInterpolants, 13448 SizeOfPredicates, 86 NumberOfNonLiveVariables, 1654 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 92/656 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-13 23:47:45,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...