/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/goblint-regression/28-race_reach_61-invariant_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 00:16:16,091 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 00:16:16,145 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 [2025-04-14 00:16:16,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 00:16:16,150 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 00:16:16,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 00:16:16,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 00:16:16,169 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 00:16:16,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 00:16:16,169 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 00:16:16,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 00:16:16,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 00:16:16,170 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 00:16:16,170 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 00:16:16,171 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:16:16,171 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:16:16,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:16:16,173 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 00:16:16,173 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 00:16:16,173 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 00:16:16,173 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 00:16:16,173 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 00:16:16,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 00:16:16,173 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 00:16:16,173 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 00:16:16,173 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 00:16:16,173 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 [2025-04-14 00:16:16,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 00:16:16,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 00:16:16,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 00:16:16,408 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 00:16:16,408 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 00:16:16,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2025-04-14 00:16:17,792 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c91fdd79c/11d3972d47ac41859e9313726b8905e5/FLAG643a40967 [2025-04-14 00:16:18,024 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 00:16:18,024 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2025-04-14 00:16:18,033 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c91fdd79c/11d3972d47ac41859e9313726b8905e5/FLAG643a40967 [2025-04-14 00:16:18,841 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c91fdd79c/11d3972d47ac41859e9313726b8905e5 [2025-04-14 00:16:18,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 00:16:18,845 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 00:16:18,847 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 00:16:18,847 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 00:16:18,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 00:16:18,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:16:18" (1/1) ... [2025-04-14 00:16:18,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f11ca60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:18, skipping insertion in model container [2025-04-14 00:16:18,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:16:18" (1/1) ... [2025-04-14 00:16:18,876 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 00:16:19,157 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2025-04-14 00:16:19,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:16:19,206 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 00:16:19,262 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2025-04-14 00:16:19,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:16:19,294 INFO L204 MainTranslator]: Completed translation [2025-04-14 00:16:19,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19 WrapperNode [2025-04-14 00:16:19,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 00:16:19,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 00:16:19,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 00:16:19,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 00:16:19,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,311 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,324 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2025-04-14 00:16:19,324 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 00:16:19,325 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 00:16:19,325 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 00:16:19,325 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 00:16:19,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,332 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,351 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2025-04-14 00:16:19,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,365 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 00:16:19,372 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 00:16:19,372 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 00:16:19,372 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 00:16:19,373 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (1/1) ... [2025-04-14 00:16:19,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:16:19,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:16:19,399 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) [2025-04-14 00:16:19,401 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 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2025-04-14 00:16:19,416 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-04-14 00:16:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-14 00:16:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 00:16:19,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 00:16:19,417 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 00:16:19,508 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 00:16:19,510 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 00:16:19,629 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L713: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2025-04-14 00:16:19,630 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L713-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2025-04-14 00:16:19,668 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 00:16:19,669 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 00:16:19,669 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 00:16:19,773 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 00:16:19,776 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 00:16:19,784 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 00:16:19,787 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 00:16:19,790 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 00:16:19,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:16:19 BoogieIcfgContainer [2025-04-14 00:16:19,790 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 00:16:19,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 00:16:19,794 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 00:16:19,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 00:16:19,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 12:16:18" (1/3) ... [2025-04-14 00:16:19,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34247842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:16:19, skipping insertion in model container [2025-04-14 00:16:19,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:16:19" (2/3) ... [2025-04-14 00:16:19,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34247842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:16:19, skipping insertion in model container [2025-04-14 00:16:19,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:16:19" (3/3) ... [2025-04-14 00:16:19,802 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2025-04-14 00:16:19,812 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 00:16:19,813 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_61-invariant_racing.i that has 2 procedures, 45 locations, 64 edges, 1 initial locations, 7 loop locations, and 1 error locations. [2025-04-14 00:16:19,813 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 00:16:19,845 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-04-14 00:16:19,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 65 transitions, 137 flow [2025-04-14 00:16:19,923 INFO L116 PetriNetUnfolderBase]: 28/92 cut-off events. [2025-04-14 00:16:19,926 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-14 00:16:19,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 92 events. 28/92 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 265 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 58. Up to 8 conditions per place. [2025-04-14 00:16:19,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 65 transitions, 137 flow [2025-04-14 00:16:19,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 62 transitions, 128 flow [2025-04-14 00:16:19,942 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 00:16:19,952 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;@7b4faa6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 00:16:19,953 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-14 00:16:19,964 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 00:16:19,964 INFO L116 PetriNetUnfolderBase]: 6/25 cut-off events. [2025-04-14 00:16:19,964 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-14 00:16:19,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:16:19,968 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-04-14 00:16:19,968 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:16:19,974 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:16:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash 11416799, now seen corresponding path program 1 times [2025-04-14 00:16:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:16:19,981 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253464435] [2025-04-14 00:16:19,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:16:19,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:16:20,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-14 00:16:20,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-14 00:16:20,085 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:20,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 00:16:20,085 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-14 00:16:20,097 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-14 00:16:20,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-14 00:16:20,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:20,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 00:16:20,130 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-14 00:16:20,132 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-14 00:16:20,133 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2025-04-14 00:16:20,135 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2025-04-14 00:16:20,136 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 00:16:20,136 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-14 00:16:20,141 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-14 00:16:20,141 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-14 00:16:20,164 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-14 00:16:20,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 96 transitions, 208 flow [2025-04-14 00:16:20,196 INFO L116 PetriNetUnfolderBase]: 48/158 cut-off events. [2025-04-14 00:16:20,196 INFO L117 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2025-04-14 00:16:20,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 158 events. 48/158 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 597 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 96. Up to 12 conditions per place. [2025-04-14 00:16:20,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 96 transitions, 208 flow [2025-04-14 00:16:20,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 96 transitions, 208 flow [2025-04-14 00:16:20,202 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 00:16:20,202 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;@7b4faa6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 00:16:20,203 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-14 00:16:20,210 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 00:16:20,210 INFO L116 PetriNetUnfolderBase]: 9/40 cut-off events. [2025-04-14 00:16:20,210 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 00:16:20,210 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:16:20,210 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-14 00:16:20,211 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:16:20,212 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:16:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 823786325, now seen corresponding path program 1 times [2025-04-14 00:16:20,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:16:20,212 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290147662] [2025-04-14 00:16:20,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:16:20,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:16:20,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-14 00:16:20,224 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-14 00:16:20,224 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:20,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:16:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:16:20,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:16:20,260 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290147662] [2025-04-14 00:16:20,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290147662] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:16:20,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:16:20,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 00:16:20,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140915275] [2025-04-14 00:16:20,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:16:20,266 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-14 00:16:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:16:20,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-14 00:16:20,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-14 00:16:20,285 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 96 [2025-04-14 00:16:20,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 96 transitions, 208 flow. Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 00:16:20,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:16:20,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 96 [2025-04-14 00:16:20,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:16:21,809 INFO L116 PetriNetUnfolderBase]: 11120/17545 cut-off events. [2025-04-14 00:16:21,810 INFO L117 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2025-04-14 00:16:21,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34661 conditions, 17545 events. 11120/17545 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 114810 event pairs, 10432 based on Foata normal form. 0/16105 useless extension candidates. Maximal degree in co-relation 29176. Up to 17024 conditions per place. [2025-04-14 00:16:21,939 INFO L140 encePairwiseOnDemand]: 71/96 looper letters, 50 selfloop transitions, 0 changer transitions 9/71 dead transitions. [2025-04-14 00:16:21,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 276 flow [2025-04-14 00:16:21,941 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-14 00:16:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-14 00:16:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2025-04-14 00:16:21,954 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-04-14 00:16:21,955 INFO L175 Difference]: Start difference. First operand has 72 places, 96 transitions, 208 flow. Second operand 2 states and 108 transitions. [2025-04-14 00:16:21,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 276 flow [2025-04-14 00:16:21,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-14 00:16:21,965 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 134 flow [2025-04-14 00:16:21,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2025-04-14 00:16:21,971 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2025-04-14 00:16:21,971 INFO L485 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 134 flow [2025-04-14 00:16:21,971 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 00:16:21,971 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:16:21,972 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-04-14 00:16:21,972 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 00:16:21,972 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:16:21,973 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:16:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash 953476346, now seen corresponding path program 1 times [2025-04-14 00:16:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:16:21,973 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102088675] [2025-04-14 00:16:21,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:16:21,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:16:21,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-14 00:16:22,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-14 00:16:22,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:22,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 00:16:22,005 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-14 00:16:22,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-14 00:16:22,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-14 00:16:22,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:22,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 00:16:22,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-14 00:16:22,035 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-14 00:16:22,035 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2025-04-14 00:16:22,035 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2025-04-14 00:16:22,035 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-14 00:16:22,035 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-04-14 00:16:22,036 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-14 00:16:22,036 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-14 00:16:22,064 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-14 00:16:22,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 127 transitions, 281 flow [2025-04-14 00:16:22,087 INFO L116 PetriNetUnfolderBase]: 71/233 cut-off events. [2025-04-14 00:16:22,088 INFO L117 PetriNetUnfolderBase]: For 19/24 co-relation queries the response was YES. [2025-04-14 00:16:22,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 233 events. 71/233 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1006 event pairs, 1 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 169. Up to 16 conditions per place. [2025-04-14 00:16:22,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 127 transitions, 281 flow [2025-04-14 00:16:22,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 127 transitions, 281 flow [2025-04-14 00:16:22,096 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 00:16:22,096 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;@7b4faa6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 00:16:22,096 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-14 00:16:22,100 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 00:16:22,100 INFO L116 PetriNetUnfolderBase]: 9/40 cut-off events. [2025-04-14 00:16:22,100 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-14 00:16:22,100 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:16:22,100 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-14 00:16:22,101 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:16:22,101 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:16:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash 285917941, now seen corresponding path program 1 times [2025-04-14 00:16:22,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:16:22,102 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456541934] [2025-04-14 00:16:22,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:16:22,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:16:22,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-14 00:16:22,117 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-14 00:16:22,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:22,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:16:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:16:22,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:16:22,130 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456541934] [2025-04-14 00:16:22,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456541934] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:16:22,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:16:22,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 00:16:22,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292023692] [2025-04-14 00:16:22,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:16:22,131 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-14 00:16:22,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:16:22,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-14 00:16:22,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-14 00:16:22,131 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 127 [2025-04-14 00:16:22,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 127 transitions, 281 flow. Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:16:22,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:16:22,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 127 [2025-04-14 00:16:22,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:16:40,669 INFO L116 PetriNetUnfolderBase]: 291553/399423 cut-off events. [2025-04-14 00:16:40,669 INFO L117 PetriNetUnfolderBase]: For 3073/3073 co-relation queries the response was YES. [2025-04-14 00:16:41,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794775 conditions, 399423 events. 291553/399423 cut-off events. For 3073/3073 co-relation queries the response was YES. Maximal size of possible extension queue 6841. Compared 2955396 event pairs, 273793 based on Foata normal form. 0/368672 useless extension candidates. Maximal degree in co-relation 587521. Up to 393167 conditions per place. [2025-04-14 00:16:42,291 INFO L140 encePairwiseOnDemand]: 95/127 looper letters, 68 selfloop transitions, 0 changer transitions 10/95 dead transitions. [2025-04-14 00:16:42,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 95 transitions, 373 flow [2025-04-14 00:16:42,291 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-14 00:16:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-14 00:16:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 144 transitions. [2025-04-14 00:16:42,292 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5669291338582677 [2025-04-14 00:16:42,292 INFO L175 Difference]: Start difference. First operand has 96 places, 127 transitions, 281 flow. Second operand 2 states and 144 transitions. [2025-04-14 00:16:42,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 95 transitions, 373 flow [2025-04-14 00:16:42,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 95 transitions, 373 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-14 00:16:42,312 INFO L231 Difference]: Finished difference. Result has 97 places, 85 transitions, 188 flow [2025-04-14 00:16:42,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=188, PETRI_PLACES=97, PETRI_TRANSITIONS=85} [2025-04-14 00:16:42,313 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 1 predicate places. [2025-04-14 00:16:42,313 INFO L485 AbstractCegarLoop]: Abstraction has has 97 places, 85 transitions, 188 flow [2025-04-14 00:16:42,313 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:16:42,313 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:16:42,313 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2025-04-14 00:16:42,313 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 00:16:42,313 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:16:42,313 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:16:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash -38073328, now seen corresponding path program 1 times [2025-04-14 00:16:42,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:16:42,314 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597708788] [2025-04-14 00:16:42,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:16:42,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:16:42,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-14 00:16:42,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-14 00:16:42,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:42,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 00:16:42,329 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-14 00:16:42,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-14 00:16:42,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-14 00:16:42,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:42,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 00:16:42,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-14 00:16:42,356 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-14 00:16:42,356 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2025-04-14 00:16:42,356 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2025-04-14 00:16:42,356 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-14 00:16:42,357 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-04-14 00:16:42,358 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-14 00:16:42,358 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-04-14 00:16:42,383 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-14 00:16:42,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 158 transitions, 356 flow [2025-04-14 00:16:42,398 INFO L116 PetriNetUnfolderBase]: 102/328 cut-off events. [2025-04-14 00:16:42,399 INFO L117 PetriNetUnfolderBase]: For 48/60 co-relation queries the response was YES. [2025-04-14 00:16:42,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 328 events. 102/328 cut-off events. For 48/60 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1477 event pairs, 6 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 257. Up to 32 conditions per place. [2025-04-14 00:16:42,400 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 158 transitions, 356 flow [2025-04-14 00:16:42,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 158 transitions, 356 flow [2025-04-14 00:16:42,403 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 00:16:42,403 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;@7b4faa6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 00:16:42,403 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-14 00:16:42,405 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 00:16:42,405 INFO L116 PetriNetUnfolderBase]: 9/40 cut-off events. [2025-04-14 00:16:42,405 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-14 00:16:42,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:16:42,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-14 00:16:42,405 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:16:42,406 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:16:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash 665136693, now seen corresponding path program 1 times [2025-04-14 00:16:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:16:42,408 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398943742] [2025-04-14 00:16:42,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:16:42,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:16:42,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-14 00:16:42,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-14 00:16:42,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:16:42,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:16:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:16:42,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:16:42,430 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398943742] [2025-04-14 00:16:42,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398943742] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:16:42,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:16:42,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 00:16:42,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096792580] [2025-04-14 00:16:42,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:16:42,430 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-14 00:16:42,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:16:42,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-14 00:16:42,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-14 00:16:42,431 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 158 [2025-04-14 00:16:42,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 158 transitions, 356 flow. Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:16:42,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:16:42,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 158 [2025-04-14 00:16:42,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand