./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:01:56,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:01:56,543 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:01:56,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:01:56,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:01:56,561 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:01:56,561 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:01:56,561 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:01:56,562 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:01:56,562 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:01:56,562 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:01:56,562 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:01:56,562 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:01:56,562 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:01:56,562 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:01:56,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:01:56,563 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:01:56,564 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:01:56,564 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:01:56,564 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:01:56,564 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:01:56,564 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:01:56,564 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:01:56,564 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:01:56,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:01:56,564 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:01:56,564 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:01:56,565 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:01:56,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:01:56,565 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:01:56,565 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:01:56,565 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:01:56,565 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:01:56,565 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 [2025-03-17 14:01:56,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:01:56,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:01:56,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:01:56,769 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:01:56,769 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:01:56,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2025-03-17 14:01:57,879 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/834b96d38/17ba592b02bd4a70b848a4715b6ed7a7/FLAGe2ba0bb8a [2025-03-17 14:01:58,180 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:01:58,181 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2025-03-17 14:01:58,193 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/834b96d38/17ba592b02bd4a70b848a4715b6ed7a7/FLAGe2ba0bb8a [2025-03-17 14:01:58,448 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/834b96d38/17ba592b02bd4a70b848a4715b6ed7a7 [2025-03-17 14:01:58,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:01:58,451 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:01:58,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:01:58,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:01:58,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:01:58,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dbee39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58, skipping insertion in model container [2025-03-17 14:01:58,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,474 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:01:58,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:01:58,761 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:01:58,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:01:58,820 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:01:58,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58 WrapperNode [2025-03-17 14:01:58,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:01:58,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:01:58,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:01:58,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:01:58,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,835 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,849 INFO L138 Inliner]: procedures = 172, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 162 [2025-03-17 14:01:58,849 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:01:58,850 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:01:58,851 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:01:58,851 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:01:58,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,858 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,869 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 6, 3, 5]. 38 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 1]. The 5 writes are split as follows [0, 2, 2, 1]. [2025-03-17 14:01:58,870 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,870 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,874 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,875 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,876 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,878 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:01:58,879 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:01:58,879 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:01:58,879 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:01:58,880 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (1/1) ... [2025-03-17 14:01:58,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:01:58,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:01:58,903 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 14:01:58,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-03-17 14:01:58,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-17 14:01:58,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:01:58,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:01:58,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:01:58,922 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:01:59,016 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:01:59,018 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:01:59,285 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:01:59,285 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:01:59,603 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:01:59,604 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:01:59,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:01:59 BoogieIcfgContainer [2025-03-17 14:01:59,604 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:01:59,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:01:59,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:01:59,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:01:59,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:01:58" (1/3) ... [2025-03-17 14:01:59,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33201589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:01:59, skipping insertion in model container [2025-03-17 14:01:59,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:01:58" (2/3) ... [2025-03-17 14:01:59,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33201589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:01:59, skipping insertion in model container [2025-03-17 14:01:59,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:01:59" (3/3) ... [2025-03-17 14:01:59,611 INFO L128 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2025-03-17 14:01:59,621 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:01:59,622 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 36_stack_cas_p0_vs_concur.i that has 2 procedures, 53 locations, 1 initial locations, 3 loop locations, and 30 error locations. [2025-03-17 14:01:59,622 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:01:59,677 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 14:01:59,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 56 transitions, 116 flow [2025-03-17 14:01:59,728 INFO L124 PetriNetUnfolderBase]: 3/60 cut-off events. [2025-03-17 14:01:59,731 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:01:59,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 60 events. 3/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 156 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2025-03-17 14:01:59,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 56 transitions, 116 flow [2025-03-17 14:01:59,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 56 transitions, 116 flow [2025-03-17 14:01:59,746 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:01:59,758 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@5c589f3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:01:59,758 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2025-03-17 14:01:59,761 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:01:59,762 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-03-17 14:01:59,762 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:01:59,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:01:59,762 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:01:59,763 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:01:59,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:01:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash 482265, now seen corresponding path program 1 times [2025-03-17 14:01:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:01:59,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133191434] [2025-03-17 14:01:59,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:01:59,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:02:00,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:02:00,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:02:00,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:00,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:02:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:02:00,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:02:00,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133191434] [2025-03-17 14:02:00,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133191434] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:02:00,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:02:00,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:02:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737393017] [2025-03-17 14:02:00,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:02:00,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 14:02:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:02:00,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 14:02:00,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 14:02:00,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2025-03-17 14:02:00,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:00,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:02:00,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2025-03-17 14:02:00,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:02:00,472 INFO L124 PetriNetUnfolderBase]: 55/188 cut-off events. [2025-03-17 14:02:00,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:02:00,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 188 events. 55/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 700 event pairs, 49 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 314. Up to 135 conditions per place. [2025-03-17 14:02:00,476 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 30 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2025-03-17 14:02:00,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 162 flow [2025-03-17 14:02:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 14:02:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 14:02:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 75 transitions. [2025-03-17 14:02:00,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2025-03-17 14:02:00,487 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 116 flow. Second operand 2 states and 75 transitions. [2025-03-17 14:02:00,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 162 flow [2025-03-17 14:02:00,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 162 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:02:00,493 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 102 flow [2025-03-17 14:02:00,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2025-03-17 14:02:00,497 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2025-03-17 14:02:00,497 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 102 flow [2025-03-17 14:02:00,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:00,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:02:00,498 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 14:02:00,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:02:00,498 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-17 14:02:00,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:02:00,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1485963178, now seen corresponding path program 1 times [2025-03-17 14:02:00,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:02:00,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129459596] [2025-03-17 14:02:00,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:02:00,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:02:00,726 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:02:00,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:02:00,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:00,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 14:02:00,760 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 14:02:00,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:02:00,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:02:00,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:00,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 14:02:00,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 14:02:00,806 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 14:02:00,807 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (59 of 60 remaining) [2025-03-17 14:02:00,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 60 remaining) [2025-03-17 14:02:00,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 60 remaining) [2025-03-17 14:02:00,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 60 remaining) [2025-03-17 14:02:00,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 60 remaining) [2025-03-17 14:02:00,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 60 remaining) [2025-03-17 14:02:00,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 60 remaining) [2025-03-17 14:02:00,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (50 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (43 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (42 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 60 remaining) [2025-03-17 14:02:00,809 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (29 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (20 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (13 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (12 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 60 remaining) [2025-03-17 14:02:00,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 60 remaining) [2025-03-17 14:02:00,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 60 remaining) [2025-03-17 14:02:00,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 60 remaining) [2025-03-17 14:02:00,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 60 remaining) [2025-03-17 14:02:00,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 60 remaining) [2025-03-17 14:02:00,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 60 remaining) [2025-03-17 14:02:00,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 60 remaining) [2025-03-17 14:02:00,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:02:00,811 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-03-17 14:02:00,813 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-17 14:02:00,813 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-03-17 14:02:00,855 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 14:02:00,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 105 transitions, 220 flow [2025-03-17 14:02:00,877 INFO L124 PetriNetUnfolderBase]: 6/114 cut-off events. [2025-03-17 14:02:00,877 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:02:00,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 114 events. 6/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 459 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2025-03-17 14:02:00,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 105 transitions, 220 flow [2025-03-17 14:02:00,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 105 transitions, 220 flow [2025-03-17 14:02:00,881 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:02:00,881 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@5c589f3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:02:00,881 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-03-17 14:02:00,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:02:00,883 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-03-17 14:02:00,883 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:02:00,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:02:00,883 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:02:00,883 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-03-17 14:02:00,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:02:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash 586530, now seen corresponding path program 1 times [2025-03-17 14:02:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:02:00,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501392398] [2025-03-17 14:02:00,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:02:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:02:01,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:02:01,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:02:01,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:01,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:02:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:02:01,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:02:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501392398] [2025-03-17 14:02:01,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501392398] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:02:01,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:02:01,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:02:01,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503756370] [2025-03-17 14:02:01,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:02:01,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 14:02:01,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:02:01,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 14:02:01,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 14:02:01,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 105 [2025-03-17 14:02:01,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 105 transitions, 220 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:01,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:02:01,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 105 [2025-03-17 14:02:01,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:02:01,855 INFO L124 PetriNetUnfolderBase]: 3609/6960 cut-off events. [2025-03-17 14:02:01,856 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2025-03-17 14:02:01,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12758 conditions, 6960 events. 3609/6960 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 51290 event pairs, 3291 based on Foata normal form. 0/3716 useless extension candidates. Maximal degree in co-relation 11830. Up to 5715 conditions per place. [2025-03-17 14:02:01,897 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 57 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2025-03-17 14:02:01,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 312 flow [2025-03-17 14:02:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 14:02:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 14:02:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 142 transitions. [2025-03-17 14:02:01,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2025-03-17 14:02:01,899 INFO L175 Difference]: Start difference. First operand has 104 places, 105 transitions, 220 flow. Second operand 2 states and 142 transitions. [2025-03-17 14:02:01,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 312 flow [2025-03-17 14:02:01,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 94 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:02:01,901 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 198 flow [2025-03-17 14:02:01,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2025-03-17 14:02:01,901 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -8 predicate places. [2025-03-17 14:02:01,901 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 198 flow [2025-03-17 14:02:01,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:01,902 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:02:01,902 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:02:01,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:02:01,902 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-03-17 14:02:01,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:02:01,902 INFO L85 PathProgramCache]: Analyzing trace with hash 298763753, now seen corresponding path program 1 times [2025-03-17 14:02:01,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:02:01,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382513992] [2025-03-17 14:02:01,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:02:01,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:02:02,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:02:02,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:02:02,143 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:02,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:02:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:02:02,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:02:02,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382513992] [2025-03-17 14:02:02,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382513992] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:02:02,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:02:02,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:02:02,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534734409] [2025-03-17 14:02:02,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:02:02,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:02:02,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:02:02,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:02:02,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:02:02,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 105 [2025-03-17 14:02:02,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:02,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:02:02,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 105 [2025-03-17 14:02:02,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:02:03,301 INFO L124 PetriNetUnfolderBase]: 7152/13217 cut-off events. [2025-03-17 14:02:03,302 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2025-03-17 14:02:03,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24593 conditions, 13217 events. 7152/13217 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 99543 event pairs, 2576 based on Foata normal form. 0/7485 useless extension candidates. Maximal degree in co-relation 24588. Up to 6474 conditions per place. [2025-03-17 14:02:03,375 INFO L140 encePairwiseOnDemand]: 91/105 looper letters, 106 selfloop transitions, 8 changer transitions 0/144 dead transitions. [2025-03-17 14:02:03,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 144 transitions, 531 flow [2025-03-17 14:02:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:02:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:02:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2025-03-17 14:02:03,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2025-03-17 14:02:03,379 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 198 flow. Second operand 3 states and 213 transitions. [2025-03-17 14:02:03,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 144 transitions, 531 flow [2025-03-17 14:02:03,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 531 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:02:03,383 INFO L231 Difference]: Finished difference. Result has 100 places, 101 transitions, 270 flow [2025-03-17 14:02:03,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=100, PETRI_TRANSITIONS=101} [2025-03-17 14:02:03,385 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -4 predicate places. [2025-03-17 14:02:03,385 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 101 transitions, 270 flow [2025-03-17 14:02:03,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:03,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:02:03,386 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:02:03,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:02:03,386 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-03-17 14:02:03,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:02:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash 298763754, now seen corresponding path program 1 times [2025-03-17 14:02:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:02:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988575409] [2025-03-17 14:02:03,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:02:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:02:03,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:02:03,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:02:03,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:03,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:02:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:02:03,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:02:03,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988575409] [2025-03-17 14:02:03,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988575409] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:02:03,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:02:03,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:02:03,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793905773] [2025-03-17 14:02:03,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:02:03,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:02:03,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:02:03,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:02:03,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:02:03,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 105 [2025-03-17 14:02:03,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 101 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:03,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:02:03,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 105 [2025-03-17 14:02:03,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:02:04,581 INFO L124 PetriNetUnfolderBase]: 5509/10651 cut-off events. [2025-03-17 14:02:04,582 INFO L125 PetriNetUnfolderBase]: For 1543/1618 co-relation queries the response was YES. [2025-03-17 14:02:04,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21147 conditions, 10651 events. 5509/10651 cut-off events. For 1543/1618 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 80649 event pairs, 1883 based on Foata normal form. 786/7204 useless extension candidates. Maximal degree in co-relation 21140. Up to 7271 conditions per place. [2025-03-17 14:02:04,631 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 85 selfloop transitions, 3 changer transitions 0/124 dead transitions. [2025-03-17 14:02:04,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 499 flow [2025-03-17 14:02:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:02:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:02:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2025-03-17 14:02:04,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2025-03-17 14:02:04,635 INFO L175 Difference]: Start difference. First operand has 100 places, 101 transitions, 270 flow. Second operand 3 states and 192 transitions. [2025-03-17 14:02:04,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 499 flow [2025-03-17 14:02:04,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 124 transitions, 483 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:02:04,642 INFO L231 Difference]: Finished difference. Result has 94 places, 95 transitions, 248 flow [2025-03-17 14:02:04,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=94, PETRI_TRANSITIONS=95} [2025-03-17 14:02:04,644 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -10 predicate places. [2025-03-17 14:02:04,644 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 95 transitions, 248 flow [2025-03-17 14:02:04,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:04,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:02:04,645 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-03-17 14:02:04,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:02:04,645 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-03-17 14:02:04,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:02:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash -934256578, now seen corresponding path program 1 times [2025-03-17 14:02:04,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:02:04,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130226999] [2025-03-17 14:02:04,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:02:04,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:02:04,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:02:04,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:02:04,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:04,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 14:02:04,852 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-17 14:02:04,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:02:04,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:02:04,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:04,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-17 14:02:04,864 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-17 14:02:04,867 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-17 14:02:04,867 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (88 of 89 remaining) [2025-03-17 14:02:04,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 89 remaining) [2025-03-17 14:02:04,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 89 remaining) [2025-03-17 14:02:04,867 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 89 remaining) [2025-03-17 14:02:04,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 89 remaining) [2025-03-17 14:02:04,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 89 remaining) [2025-03-17 14:02:04,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 89 remaining) [2025-03-17 14:02:04,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 89 remaining) [2025-03-17 14:02:04,868 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (79 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (72 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (71 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 89 remaining) [2025-03-17 14:02:04,869 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (58 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (49 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 89 remaining) [2025-03-17 14:02:04,870 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (42 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (41 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (20 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 89 remaining) [2025-03-17 14:02:04,871 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (13 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (12 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 89 remaining) [2025-03-17 14:02:04,874 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 89 remaining) [2025-03-17 14:02:04,875 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 89 remaining) [2025-03-17 14:02:04,875 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 89 remaining) [2025-03-17 14:02:04,875 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 89 remaining) [2025-03-17 14:02:04,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:02:04,875 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2025-03-17 14:02:04,875 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-17 14:02:04,875 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-03-17 14:02:04,929 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 14:02:04,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 154 transitions, 326 flow [2025-03-17 14:02:04,945 INFO L124 PetriNetUnfolderBase]: 9/168 cut-off events. [2025-03-17 14:02:04,945 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-17 14:02:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 168 events. 9/168 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 801 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 149. Up to 4 conditions per place. [2025-03-17 14:02:04,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 154 transitions, 326 flow [2025-03-17 14:02:04,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 154 transitions, 326 flow [2025-03-17 14:02:04,949 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:02:04,949 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@5c589f3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:02:04,949 INFO L334 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2025-03-17 14:02:04,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:02:04,951 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-03-17 14:02:04,951 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:02:04,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:02:04,951 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:02:04,951 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2025-03-17 14:02:04,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:02:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash 739452, now seen corresponding path program 1 times [2025-03-17 14:02:04,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:02:04,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856161648] [2025-03-17 14:02:04,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:02:04,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:02:05,084 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:02:05,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:02:05,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:05,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:02:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:02:05,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:02:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856161648] [2025-03-17 14:02:05,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856161648] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:02:05,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:02:05,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:02:05,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112288625] [2025-03-17 14:02:05,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:02:05,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 14:02:05,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:02:05,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 14:02:05,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 14:02:05,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 154 [2025-03-17 14:02:05,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 154 transitions, 326 flow. Second operand has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:05,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:02:05,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 154 [2025-03-17 14:02:05,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:02:18,604 INFO L124 PetriNetUnfolderBase]: 150883/232104 cut-off events. [2025-03-17 14:02:18,604 INFO L125 PetriNetUnfolderBase]: For 4226/4226 co-relation queries the response was YES. [2025-03-17 14:02:19,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440591 conditions, 232104 events. 150883/232104 cut-off events. For 4226/4226 co-relation queries the response was YES. Maximal size of possible extension queue 6435. Compared 2088997 event pairs, 138397 based on Foata normal form. 0/116532 useless extension candidates. Maximal degree in co-relation 281666. Up to 205699 conditions per place. [2025-03-17 14:02:19,968 INFO L140 encePairwiseOnDemand]: 141/154 looper letters, 84 selfloop transitions, 0 changer transitions 0/139 dead transitions. [2025-03-17 14:02:19,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 139 transitions, 464 flow [2025-03-17 14:02:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 14:02:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 14:02:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 209 transitions. [2025-03-17 14:02:19,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2025-03-17 14:02:19,969 INFO L175 Difference]: Start difference. First operand has 152 places, 154 transitions, 326 flow. Second operand 2 states and 209 transitions. [2025-03-17 14:02:19,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 139 transitions, 464 flow [2025-03-17 14:02:19,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 139 transitions, 462 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 14:02:19,974 INFO L231 Difference]: Finished difference. Result has 141 places, 139 transitions, 294 flow [2025-03-17 14:02:19,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=139} [2025-03-17 14:02:19,974 INFO L279 CegarLoopForPetriNet]: 152 programPoint places, -11 predicate places. [2025-03-17 14:02:19,974 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 139 transitions, 294 flow [2025-03-17 14:02:19,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:19,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:02:19,975 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:02:19,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:02:19,975 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2025-03-17 14:02:19,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:02:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 561078649, now seen corresponding path program 1 times [2025-03-17 14:02:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:02:19,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904634304] [2025-03-17 14:02:19,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:02:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:02:20,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:02:20,330 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:02:20,330 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:02:20,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:02:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:02:20,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:02:20,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904634304] [2025-03-17 14:02:20,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904634304] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:02:20,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:02:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:02:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801105902] [2025-03-17 14:02:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:02:20,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:02:20,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:02:20,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:02:20,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:02:20,430 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 154 [2025-03-17 14:02:20,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 139 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:02:20,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:02:20,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 154 [2025-03-17 14:02:20,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand