/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/queue_ok_longer.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:46:27,743 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:46:27,797 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 23:46:27,802 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:46:27,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:46:27,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:46:27,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:46:27,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:46:27,825 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:46:27,825 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:46:27,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:46:27,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:46:27,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:46:27,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:46:27,826 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:46:27,826 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:46:27,827 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:46:27,827 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:46:27,827 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:46:27,828 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 23:46:28,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:46:28,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:46:28,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:46:28,028 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:46:28,028 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:46:28,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longer.i [2025-04-13 23:46:29,313 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29f4b3f4/b57f598727574ca2a69f3595f80a4486/FLAGf70cfd14d [2025-04-13 23:46:29,560 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:46:29,563 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longer.i [2025-04-13 23:46:29,580 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29f4b3f4/b57f598727574ca2a69f3595f80a4486/FLAGf70cfd14d [2025-04-13 23:46:30,364 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29f4b3f4/b57f598727574ca2a69f3595f80a4486 [2025-04-13 23:46:30,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:46:30,367 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:46:30,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:46:30,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:46:30,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:46:30,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:30,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@686d127a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30, skipping insertion in model container [2025-04-13 23:46:30,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:30,403 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:46:30,730 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/queue_ok_longer.i[43272,43285] [2025-04-13 23:46:30,736 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/queue_ok_longer.i[43545,43558] [2025-04-13 23:46:30,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:46:30,772 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:46:30,815 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/queue_ok_longer.i[43272,43285] [2025-04-13 23:46:30,816 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/queue_ok_longer.i[43545,43558] [2025-04-13 23:46:30,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:46:30,908 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:46:30,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30 WrapperNode [2025-04-13 23:46:30,910 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:46:30,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:46:30,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:46:30,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:46:30,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:30,938 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:30,994 INFO L138 Inliner]: procedures = 274, calls = 852, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 991 [2025-04-13 23:46:30,998 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:46:30,998 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:46:30,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:46:30,998 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:46:31,009 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,055 INFO L175 MemorySlicer]: Split 835 memory accesses to 4 slices as follows [2, 5, 402, 426]. 51 percent of accesses are in the largest equivalence class. The 810 initializations are split as follows [2, 5, 400, 403]. The 11 writes are split as follows [0, 0, 1, 10]. [2025-04-13 23:46:31,056 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,056 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,077 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,079 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,088 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:46:31,100 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:46:31,100 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:46:31,100 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:46:31,101 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (1/1) ... [2025-04-13 23:46:31,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:46:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:46:31,127 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 23:46:31,131 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 23:46:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:46:31,146 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:46:31,146 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-04-13 23:46:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:46:31,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:46:31,147 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 23:46:31,248 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:46:31,250 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:46:32,227 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:46:32,228 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:46:32,228 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:46:43,699 WARN L179 LargeBlockEncoding]: Complex 2:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:46:43,724 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:46:43,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:46:43 BoogieIcfgContainer [2025-04-13 23:46:43,725 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:46:43,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:46:43,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:46:43,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:46:43,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:46:30" (1/3) ... [2025-04-13 23:46:43,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7890682f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:46:43, skipping insertion in model container [2025-04-13 23:46:43,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:46:30" (2/3) ... [2025-04-13 23:46:43,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7890682f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:46:43, skipping insertion in model container [2025-04-13 23:46:43,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:46:43" (3/3) ... [2025-04-13 23:46:43,733 INFO L128 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2025-04-13 23:46:43,744 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:46:43,745 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG queue_ok_longer.i that has 3 procedures, 24 locations, 24 edges, 1 initial locations, 2 loop locations, and 2 error locations. [2025-04-13 23:46:43,745 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:46:43,849 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 23:46:43,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2025-04-13 23:46:43,911 INFO L116 PetriNetUnfolderBase]: 5/27 cut-off events. [2025-04-13 23:46:43,913 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:46:43,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-04-13 23:46:43,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2025-04-13 23:46:43,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 59 flow [2025-04-13 23:46:43,927 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:46:43,934 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;@14a40616, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:46:43,934 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 23:46:43,935 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:46:43,935 INFO L116 PetriNetUnfolderBase]: 0/0 cut-off events. [2025-04-13 23:46:43,935 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:46:43,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:46:43,936 INFO L206 CegarLoopForPetriNet]: trace histogram [1] [2025-04-13 23:46:43,936 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:46:43,939 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:46:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2084, now seen corresponding path program 1 times [2025-04-13 23:46:43,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:46:43,945 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197572794] [2025-04-13 23:46:43,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:46:43,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:46:44,002 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-13 23:46:44,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-13 23:46:44,004 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:46:44,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:44,031 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 23:46:44,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:46:44,032 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197572794] [2025-04-13 23:46:44,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197572794] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:46:44,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:46:44,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2025-04-13 23:46:44,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768492373] [2025-04-13 23:46:44,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:46:44,038 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 23:46:44,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:46:44,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 23:46:44,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 23:46:44,058 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:46:44,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 59 flow. Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 23:46:44,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:46:44,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:46:44,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:46:44,365 INFO L116 PetriNetUnfolderBase]: 239/374 cut-off events. [2025-04-13 23:46:44,365 INFO L117 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-04-13 23:46:44,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 374 events. 239/374 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1114 event pairs, 158 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 722. Up to 375 conditions per place. [2025-04-13 23:46:44,370 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 20 selfloop transitions, 0 changer transitions 4/24 dead transitions. [2025-04-13 23:46:44,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 105 flow [2025-04-13 23:46:44,372 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 23:46:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 23:46:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 29 transitions. [2025-04-13 23:46:44,380 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 23:46:44,381 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 59 flow. Second operand 2 states and 29 transitions. [2025-04-13 23:46:44,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 105 flow [2025-04-13 23:46:44,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-13 23:46:44,386 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 44 flow [2025-04-13 23:46:44,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2025-04-13 23:46:44,390 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 23:46:44,390 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 44 flow [2025-04-13 23:46:44,390 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 23:46:44,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:46:44,390 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:46:44,390 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:46:44,390 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:46:44,390 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:46:44,391 INFO L85 PathProgramCache]: Analyzing trace with hash 972520302, now seen corresponding path program 1 times [2025-04-13 23:46:44,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:46:44,391 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189306586] [2025-04-13 23:46:44,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:46:44,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:46:44,436 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-13 23:46:44,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-13 23:46:44,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:46:44,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:45,144 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 23:46:45,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:46:45,144 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189306586] [2025-04-13 23:46:45,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189306586] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:46:45,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:46:45,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 23:46:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267667235] [2025-04-13 23:46:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:46:45,146 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:46:45,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:46:45,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:46:45,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:46:45,146 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:46:45,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 23:46:45,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:46:45,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:46:45,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:46:45,350 INFO L116 PetriNetUnfolderBase]: 195/323 cut-off events. [2025-04-13 23:46:45,350 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 23:46:45,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 323 events. 195/323 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 964 event pairs, 85 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 669. Up to 178 conditions per place. [2025-04-13 23:46:45,352 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2025-04-13 23:46:45,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 135 flow [2025-04-13 23:46:45,354 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:46:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:46:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2025-04-13 23:46:45,355 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2025-04-13 23:46:45,356 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 44 flow. Second operand 3 states and 40 transitions. [2025-04-13 23:46:45,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 135 flow [2025-04-13 23:46:45,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 23:46:45,357 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2025-04-13 23:46:45,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, 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=56, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2025-04-13 23:46:45,358 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 23:46:45,358 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2025-04-13 23:46:45,358 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 23:46:45,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:46:45,358 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:46:45,358 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 23:46:45,358 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:46:45,359 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:46:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1225652560, now seen corresponding path program 1 times [2025-04-13 23:46:45,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:46:45,359 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884034341] [2025-04-13 23:46:45,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:46:45,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:46:45,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:46:45,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:46:45,428 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:46:45,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 23:46:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:46:45,681 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884034341] [2025-04-13 23:46:45,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884034341] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:46:45,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:46:45,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:46:45,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133295526] [2025-04-13 23:46:45,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:46:45,681 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:46:45,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:46:45,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:46:45,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:46:45,682 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:46:45,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 23:46:45,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:46:45,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:46:45,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:46:45,881 INFO L116 PetriNetUnfolderBase]: 121/225 cut-off events. [2025-04-13 23:46:45,882 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-13 23:46:45,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 225 events. 121/225 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 721 event pairs, 33 based on Foata normal form. 14/239 useless extension candidates. Maximal degree in co-relation 502. Up to 151 conditions per place. [2025-04-13 23:46:45,883 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2025-04-13 23:46:45,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 127 flow [2025-04-13 23:46:45,884 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:46:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:46:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2025-04-13 23:46:45,884 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2025-04-13 23:46:45,884 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 3 states and 34 transitions. [2025-04-13 23:46:45,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 127 flow [2025-04-13 23:46:45,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 23:46:45,885 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 60 flow [2025-04-13 23:46:45,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2025-04-13 23:46:45,886 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2025-04-13 23:46:45,886 INFO L485 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 60 flow [2025-04-13 23:46:45,886 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 23:46:45,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:46:45,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:46:45,886 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 23:46:45,886 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:46:45,887 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:46:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -846362191, now seen corresponding path program 1 times [2025-04-13 23:46:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:46:45,887 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525647970] [2025-04-13 23:46:45,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:46:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:46:46,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 23:46:46,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:46:46,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:46:46,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:46,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:46:46,231 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525647970] [2025-04-13 23:46:46,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525647970] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:46:46,231 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638639435] [2025-04-13 23:46:46,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:46:46,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:46:46,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:46:46,234 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 23:46:46,235 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 23:46:46,353 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 23:46:46,567 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 23:46:46,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:46:46,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:46,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 23:46:46,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:46:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:46,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:46:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:46,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638639435] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:46:46,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:46:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 23:46:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74592831] [2025-04-13 23:46:46,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:46:46,624 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:46:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:46:46,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:46:46,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:46:46,625 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:46:46,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 60 flow. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 23:46:46,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:46:46,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:46:46,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:46:46,976 INFO L116 PetriNetUnfolderBase]: 105/197 cut-off events. [2025-04-13 23:46:46,976 INFO L117 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-04-13 23:46:46,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 197 events. 105/197 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 493 event pairs, 61 based on Foata normal form. 24/221 useless extension candidates. Maximal degree in co-relation 479. Up to 150 conditions per place. [2025-04-13 23:46:46,979 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 34 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2025-04-13 23:46:46,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 190 flow [2025-04-13 23:46:46,980 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 23:46:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 23:46:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 55 transitions. [2025-04-13 23:46:46,981 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3160919540229885 [2025-04-13 23:46:46,981 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 60 flow. Second operand 6 states and 55 transitions. [2025-04-13 23:46:46,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 190 flow [2025-04-13 23:46:46,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 23:46:46,982 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 97 flow [2025-04-13 23:46:46,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2025-04-13 23:46:46,983 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2025-04-13 23:46:46,983 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 97 flow [2025-04-13 23:46:46,983 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 23:46:46,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:46:46,983 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:46:46,992 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 23:46:47,186 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:46:47,187 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:46:47,187 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:46:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1785176924, now seen corresponding path program 2 times [2025-04-13 23:46:47,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:46:47,187 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665800268] [2025-04-13 23:46:47,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:46:47,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:46:47,226 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-13 23:46:47,434 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 23:46:47,434 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:46:47,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:47,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:46:47,635 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665800268] [2025-04-13 23:46:47,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665800268] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:46:47,635 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326980065] [2025-04-13 23:46:47,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:46:47,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:46:47,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:46:47,637 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 23:46:47,638 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 23:46:47,763 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-13 23:46:48,177 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 23:46:48,177 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:46:48,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:48,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 23:46:48,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:46:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:48,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:46:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:48,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326980065] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:46:48,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:46:48,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:46:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555741220] [2025-04-13 23:46:48,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:46:48,246 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:46:48,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:46:48,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:46:48,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:46:48,247 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:46:48,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 97 flow. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 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 23:46:48,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:46:48,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:46:48,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:46:48,923 INFO L116 PetriNetUnfolderBase]: 141/269 cut-off events. [2025-04-13 23:46:48,923 INFO L117 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2025-04-13 23:46:48,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 269 events. 141/269 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 691 event pairs, 61 based on Foata normal form. 36/305 useless extension candidates. Maximal degree in co-relation 776. Up to 150 conditions per place. [2025-04-13 23:46:48,925 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 58 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2025-04-13 23:46:48,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 371 flow [2025-04-13 23:46:48,926 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 23:46:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 23:46:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 99 transitions. [2025-04-13 23:46:48,927 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28448275862068967 [2025-04-13 23:46:48,927 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 97 flow. Second operand 12 states and 99 transitions. [2025-04-13 23:46:48,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 371 flow [2025-04-13 23:46:48,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 69 transitions, 355 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-04-13 23:46:48,930 INFO L231 Difference]: Finished difference. Result has 49 places, 29 transitions, 165 flow [2025-04-13 23:46:48,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=165, PETRI_PLACES=49, PETRI_TRANSITIONS=29} [2025-04-13 23:46:48,931 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2025-04-13 23:46:48,931 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 29 transitions, 165 flow [2025-04-13 23:46:48,931 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 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 23:46:48,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:46:48,931 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:46:48,944 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 23:46:49,131 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 23:46:49,132 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:46:49,132 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:46:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1199486532, now seen corresponding path program 3 times [2025-04-13 23:46:49,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:46:49,132 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080146903] [2025-04-13 23:46:49,132 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:46:49,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:46:49,175 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-04-13 23:46:50,663 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 23:46:50,663 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:46:50,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:51,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:46:51,046 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080146903] [2025-04-13 23:46:51,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080146903] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:46:51,046 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365668147] [2025-04-13 23:46:51,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:46:51,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:46:51,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:46:51,049 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 23:46:51,050 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 23:46:51,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-04-13 23:47:01,022 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 23:47:01,023 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:47:01,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:01,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 23:47:01,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:01,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:01,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365668147] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:01,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:01,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-04-13 23:47:01,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541958511] [2025-04-13 23:47:01,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:01,234 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 23:47:01,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:01,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 23:47:01,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-04-13 23:47:01,235 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:47:01,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 29 transitions, 165 flow. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 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 23:47:01,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:01,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:47:01,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:01,824 INFO L116 PetriNetUnfolderBase]: 213/413 cut-off events. [2025-04-13 23:47:01,824 INFO L117 PetriNetUnfolderBase]: For 3517/3517 co-relation queries the response was YES. [2025-04-13 23:47:01,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 413 events. 213/413 cut-off events. For 3517/3517 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1087 event pairs, 61 based on Foata normal form. 72/485 useless extension candidates. Maximal degree in co-relation 1405. Up to 150 conditions per place. [2025-04-13 23:47:01,828 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 106 selfloop transitions, 23 changer transitions 0/129 dead transitions. [2025-04-13 23:47:01,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 129 transitions, 739 flow [2025-04-13 23:47:01,829 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 23:47:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 23:47:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 189 transitions. [2025-04-13 23:47:01,832 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27155172413793105 [2025-04-13 23:47:01,832 INFO L175 Difference]: Start difference. First operand has 49 places, 29 transitions, 165 flow. Second operand 24 states and 189 transitions. [2025-04-13 23:47:01,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 129 transitions, 739 flow [2025-04-13 23:47:01,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 129 transitions, 667 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-04-13 23:47:01,841 INFO L231 Difference]: Finished difference. Result has 79 places, 41 transitions, 285 flow [2025-04-13 23:47:01,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=285, PETRI_PLACES=79, PETRI_TRANSITIONS=41} [2025-04-13 23:47:01,842 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2025-04-13 23:47:01,843 INFO L485 AbstractCegarLoop]: Abstraction has has 79 places, 41 transitions, 285 flow [2025-04-13 23:47:01,843 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 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 23:47:01,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:01,843 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:01,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 23:47:02,043 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 23:47:02,044 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:47:02,044 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:02,044 INFO L85 PathProgramCache]: Analyzing trace with hash -930103684, now seen corresponding path program 4 times [2025-04-13 23:47:02,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:02,044 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257835190] [2025-04-13 23:47:02,044 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:47:02,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:02,109 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-04-13 23:47:02,151 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-13 23:47:02,151 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:47:02,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:02,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:02,974 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257835190] [2025-04-13 23:47:02,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257835190] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:02,974 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710634512] [2025-04-13 23:47:02,974 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:47:02,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:02,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:02,976 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 23:47:02,978 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 23:47:03,130 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-04-13 23:47:03,323 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-13 23:47:03,323 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:47:03,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:03,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 2324 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-13 23:47:03,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:03,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710634512] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:03,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-04-13 23:47:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88180182] [2025-04-13 23:47:03,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:03,896 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-04-13 23:47:03,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:03,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-04-13 23:47:03,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-04-13 23:47:03,898 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-13 23:47:03,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 41 transitions, 285 flow. Second operand has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 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 23:47:03,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:03,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-13 23:47:03,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:04,852 INFO L116 PetriNetUnfolderBase]: 357/701 cut-off events. [2025-04-13 23:47:04,853 INFO L117 PetriNetUnfolderBase]: For 34585/34585 co-relation queries the response was YES. [2025-04-13 23:47:04,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 701 events. 357/701 cut-off events. For 34585/34585 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1879 event pairs, 61 based on Foata normal form. 144/845 useless extension candidates. Maximal degree in co-relation 2533. Up to 239 conditions per place. [2025-04-13 23:47:04,858 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 202 selfloop transitions, 47 changer transitions 0/249 dead transitions. [2025-04-13 23:47:04,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 249 transitions, 1435 flow [2025-04-13 23:47:04,859 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-04-13 23:47:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-04-13 23:47:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 369 transitions. [2025-04-13 23:47:04,861 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2650862068965517 [2025-04-13 23:47:04,861 INFO L175 Difference]: Start difference. First operand has 79 places, 41 transitions, 285 flow. Second operand 48 states and 369 transitions. [2025-04-13 23:47:04,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 249 transitions, 1435 flow [2025-04-13 23:47:04,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 249 transitions, 1291 flow, removed 61 selfloop flow, removed 11 redundant places. [2025-04-13 23:47:04,871 INFO L231 Difference]: Finished difference. Result has 139 places, 65 transitions, 525 flow [2025-04-13 23:47:04,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=525, PETRI_PLACES=139, PETRI_TRANSITIONS=65} [2025-04-13 23:47:04,872 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2025-04-13 23:47:04,872 INFO L485 AbstractCegarLoop]: Abstraction has has 139 places, 65 transitions, 525 flow [2025-04-13 23:47:04,872 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 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 23:47:04,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:04,872 INFO L206 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:04,881 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 23:47:05,072 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 23:47:05,073 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-13 23:47:05,073 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1040103428, now seen corresponding path program 5 times [2025-04-13 23:47:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:05,074 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966520943] [2025-04-13 23:47:05,074 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 23:47:05,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:05,143 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 24 equivalence classes. [2025-04-13 23:47:08,373 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 59 of 59 statements. [2025-04-13 23:47:08,373 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-04-13 23:47:08,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:10,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:10,302 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966520943] [2025-04-13 23:47:10,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966520943] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:10,302 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920430869] [2025-04-13 23:47:10,302 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 23:47:10,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:10,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:10,304 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 23:47:10,305 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 23:47:10,536 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 59 statements into 24 equivalence classes. Received shutdown request... [2025-04-14 00:01:03,898 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 00:01:03,924 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 00:01:04,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2025-04-14 00:01:05,127 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2025-04-14 00:01:05,210 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 00:01:05,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-04-14 00:01:05,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2025-04-14 00:01:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462764368] [2025-04-14 00:01:05,211 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-04-14 00:01:05,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137 [2025-04-14 00:01:05,214 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-04-14 00:01:05,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:01:05,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-04-14 00:01:05,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-04-14 00:01:05,220 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 29 [2025-04-14 00:01:05,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 65 transitions, 525 flow. Second operand has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 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) [2025-04-14 00:01:05,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:01:05,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 29 [2025-04-14 00:01:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:01:05,223 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2025-04-14 00:01:05,223 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-14 00:01:05,223 WARN L610 AbstractCegarLoop]: Verification canceled: while executing Executor. [2025-04-14 00:01:05,224 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2025-04-14 00:01:05,224 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2025-04-14 00:01:05,227 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2025-04-14 00:01:05,227 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-04-14 00:01:05,227 INFO L422 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2025-04-14 00:01:05,231 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 00:01:05,231 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 00:01:05,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 12:01:05 BasicIcfg [2025-04-14 00:01:05,235 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 00:01:05,235 INFO L158 Benchmark]: Toolchain (without parser) took 874868.46ms. Allocated memory was 142.6MB in the beginning and 5.0GB in the end (delta: 4.8GB). Free memory was 98.6MB in the beginning and 2.9GB in the end (delta: -2.8GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2025-04-14 00:01:05,236 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 00:01:05,237 INFO L158 Benchmark]: CACSL2BoogieTranslator took 542.10ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 57.6MB in the end (delta: 41.0MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2025-04-14 00:01:05,237 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.39ms. Allocated memory is still 142.6MB. Free memory was 57.6MB in the beginning and 48.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-14 00:01:05,237 INFO L158 Benchmark]: Boogie Preprocessor took 101.10ms. Allocated memory is still 142.6MB. Free memory was 48.3MB in the beginning and 39.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-14 00:01:05,238 INFO L158 Benchmark]: IcfgBuilder took 12625.14ms. Allocated memory was 142.6MB in the beginning and 3.2GB in the end (delta: 3.1GB). Free memory was 39.9MB in the beginning and 2.0GB in the end (delta: -2.0GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2025-04-14 00:01:05,238 INFO L158 Benchmark]: TraceAbstraction took 861507.56ms. Allocated memory was 3.2GB in the beginning and 5.0GB in the end (delta: 1.7GB). Free memory was 2.0GB in the beginning and 2.9GB in the end (delta: -910.2MB). Peak memory consumption was 834.7MB. Max. memory is 8.0GB. [2025-04-14 00:01:05,239 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 542.10ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 57.6MB in the end (delta: 41.0MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 87.39ms. Allocated memory is still 142.6MB. Free memory was 57.6MB in the beginning and 48.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 101.10ms. Allocated memory is still 142.6MB. Free memory was 48.3MB in the beginning and 39.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * IcfgBuilder took 12625.14ms. Allocated memory was 142.6MB in the beginning and 3.2GB in the end (delta: 3.1GB). Free memory was 39.9MB in the beginning and 2.0GB in the end (delta: -2.0GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. * TraceAbstraction took 861507.56ms. Allocated memory was 3.2GB in the beginning and 5.0GB in the end (delta: 1.7GB). Free memory was 2.0GB in the beginning and 2.9GB in the end (delta: -910.2MB). Peak memory consumption was 834.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1033]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1049]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1052]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1053]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 51 edges, 5 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: 861.4s, OverallIterations: 8, TraceHistogramMax: 46, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1081 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1081 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 833 IncrementalHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 0 mSDtfsCounter, 833 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=525occurred in iteration=7, InterpolantAutomatonStates: 98, 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: 0.2s SsaConstructionTime, 15.8s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 257 NumberOfCodeBlocks, 257 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 330 ConstructedInterpolants, 0 QuantifiedInterpolants, 772 SizeOfPredicates, 2 NumberOfNonLiveVariables, 8072 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 1/2039 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown