./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 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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-?-48c9605-m [2025-02-08 08:13:13,522 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:13:13,582 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:13:13,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:13:13,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:13:13,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:13:13,605 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:13:13,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:13:13,605 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:13:13,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:13:13,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:13:13,606 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:13:13,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:13:13,607 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:13:13,607 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:13:13,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:13:13,608 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-jdk21/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 [2025-02-08 08:13:13,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:13:13,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:13:13,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:13:13,871 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:13:13,871 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:13:13,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2025-02-08 08:13:15,022 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7c786be27/2053abb7a77f4a55bdf11b576c749533/FLAGcabbe589c [2025-02-08 08:13:15,325 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:13:15,325 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2025-02-08 08:13:15,338 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7c786be27/2053abb7a77f4a55bdf11b576c749533/FLAGcabbe589c [2025-02-08 08:13:15,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7c786be27/2053abb7a77f4a55bdf11b576c749533 [2025-02-08 08:13:15,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:13:15,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:13:15,611 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:13:15,611 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:13:15,614 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:13:15,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1d4fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15, skipping insertion in model container [2025-02-08 08:13:15,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,640 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:13:15,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:13:15,845 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:13:15,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:13:15,901 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:13:15,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15 WrapperNode [2025-02-08 08:13:15,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:13:15,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:13:15,902 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:13:15,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:13:15,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,914 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,925 INFO L138 Inliner]: procedures = 172, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 162 [2025-02-08 08:13:15,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:13:15,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:13:15,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:13:15,926 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:13:15,931 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,933 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,941 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 5, 6, 3]. 38 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0]. The 5 writes are split as follows [0, 1, 2, 2]. [2025-02-08 08:13:15,941 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,941 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,944 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:13:15,949 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:13:15,949 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:13:15,949 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:13:15,950 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (1/1) ... [2025-02-08 08:13:15,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:13:15,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:13:15,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 08:13:15,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-02-08 08:13:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-08 08:13:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-08 08:13:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:13:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:13:16,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:13:16,003 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:13:16,111 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:13:16,112 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:13:16,395 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:13:16,395 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:13:16,791 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:13:16,791 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:13:16,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:13:16 BoogieIcfgContainer [2025-02-08 08:13:16,792 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:13:16,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:13:16,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:13:16,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:13:16,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:13:15" (1/3) ... [2025-02-08 08:13:16,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f51622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:13:16, skipping insertion in model container [2025-02-08 08:13:16,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:13:15" (2/3) ... [2025-02-08 08:13:16,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f51622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:13:16, skipping insertion in model container [2025-02-08 08:13:16,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:13:16" (3/3) ... [2025-02-08 08:13:16,800 INFO L128 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2025-02-08 08:13:16,812 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:13:16,813 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 36_stack_cas_p0_vs_concur.i that has 2 procedures, 54 locations, 1 initial locations, 3 loop locations, and 30 error locations. [2025-02-08 08:13:16,814 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:13:16,884 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:13:16,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 116 flow [2025-02-08 08:13:16,943 INFO L124 PetriNetUnfolderBase]: 2/60 cut-off events. [2025-02-08 08:13:16,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:16,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 60 events. 2/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 149 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. [2025-02-08 08:13:16,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 56 transitions, 116 flow [2025-02-08 08:13:16,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 56 transitions, 116 flow [2025-02-08 08:13:16,957 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:13:16,968 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;@34bbd06a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:13:16,969 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2025-02-08 08:13:16,975 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:13:16,975 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-08 08:13:16,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:16,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:16,976 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:13:16,976 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-08 08:13:16,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:16,979 INFO L85 PathProgramCache]: Analyzing trace with hash 484315, now seen corresponding path program 1 times [2025-02-08 08:13:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:16,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469841984] [2025-02-08 08:13:16,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:17,362 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:13:17,388 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:13:17,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:17,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:17,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:17,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469841984] [2025-02-08 08:13:17,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469841984] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:17,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:17,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:17,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065966889] [2025-02-08 08:13:17,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:17,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:13:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:17,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:13:17,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:13:17,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2025-02-08 08:13:17,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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) [2025-02-08 08:13:17,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:17,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2025-02-08 08:13:17,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:17,595 INFO L124 PetriNetUnfolderBase]: 43/165 cut-off events. [2025-02-08 08:13:17,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:17,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 165 events. 43/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 649 event pairs, 40 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 265. Up to 109 conditions per place. [2025-02-08 08:13:17,602 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 25 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2025-02-08 08:13:17,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 144 flow [2025-02-08 08:13:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:13:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:13:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 72 transitions. [2025-02-08 08:13:17,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-02-08 08:13:17,617 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 116 flow. Second operand 2 states and 72 transitions. [2025-02-08 08:13:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 144 flow [2025-02-08 08:13:17,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:17,624 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 94 flow [2025-02-08 08:13:17,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2025-02-08 08:13:17,631 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2025-02-08 08:13:17,631 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 94 flow [2025-02-08 08:13:17,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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) [2025-02-08 08:13:17,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:17,632 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-08 08:13:17,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:13:17,632 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-08 08:13:17,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1546979116, now seen corresponding path program 1 times [2025-02-08 08:13:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455954301] [2025-02-08 08:13:17,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:17,829 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:17,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:17,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:17,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:17,864 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:13:17,870 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:17,879 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:17,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:17,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:17,904 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:13:17,905 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:13:17,907 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (59 of 60 remaining) [2025-02-08 08:13:17,910 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 60 remaining) [2025-02-08 08:13:17,910 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 60 remaining) [2025-02-08 08:13:17,910 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 60 remaining) [2025-02-08 08:13:17,910 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 60 remaining) [2025-02-08 08:13:17,911 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 60 remaining) [2025-02-08 08:13:17,911 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 60 remaining) [2025-02-08 08:13:17,911 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (50 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (45 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (42 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 60 remaining) [2025-02-08 08:13:17,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (29 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (20 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (15 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 60 remaining) [2025-02-08 08:13:17,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 60 remaining) [2025-02-08 08:13:17,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (12 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 60 remaining) [2025-02-08 08:13:17,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 60 remaining) [2025-02-08 08:13:17,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:13:17,917 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-08 08:13:17,921 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-08 08:13:17,921 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-08 08:13:17,970 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:13:17,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 105 transitions, 220 flow [2025-02-08 08:13:17,986 INFO L124 PetriNetUnfolderBase]: 4/114 cut-off events. [2025-02-08 08:13:17,986 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:13:17,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 114 events. 4/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 442 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. [2025-02-08 08:13:17,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 105 transitions, 220 flow [2025-02-08 08:13:17,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 105 transitions, 220 flow [2025-02-08 08:13:17,989 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:13:17,990 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;@34bbd06a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:13:17,990 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-02-08 08:13:17,991 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:13:17,991 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-08 08:13:17,991 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:17,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:17,991 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:13:17,991 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:13:17,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash 588580, now seen corresponding path program 1 times [2025-02-08 08:13:17,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:17,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820265632] [2025-02-08 08:13:17,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:18,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:13:18,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:13:18,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:18,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820265632] [2025-02-08 08:13:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820265632] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:18,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:18,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:18,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342351863] [2025-02-08 08:13:18,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:18,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:13:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:18,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:13:18,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:13:18,244 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 105 [2025-02-08 08:13:18,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 220 flow. Second operand has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 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) [2025-02-08 08:13:18,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:18,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 105 [2025-02-08 08:13:18,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:18,828 INFO L124 PetriNetUnfolderBase]: 2269/4960 cut-off events. [2025-02-08 08:13:18,829 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2025-02-08 08:13:18,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8686 conditions, 4960 events. 2269/4960 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 40159 event pairs, 2140 based on Foata normal form. 129/2694 useless extension candidates. Maximal degree in co-relation 7909. Up to 3658 conditions per place. [2025-02-08 08:13:18,876 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 47 selfloop transitions, 0 changer transitions 0/86 dead transitions. [2025-02-08 08:13:18,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 276 flow [2025-02-08 08:13:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:13:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:13:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 136 transitions. [2025-02-08 08:13:18,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2025-02-08 08:13:18,879 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 220 flow. Second operand 2 states and 136 transitions. [2025-02-08 08:13:18,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 276 flow [2025-02-08 08:13:18,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 86 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:18,882 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 182 flow [2025-02-08 08:13:18,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2025-02-08 08:13:18,882 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -16 predicate places. [2025-02-08 08:13:18,882 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 182 flow [2025-02-08 08:13:18,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 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) [2025-02-08 08:13:18,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:18,883 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:13:18,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:13:18,883 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:13:18,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash 359777707, now seen corresponding path program 1 times [2025-02-08 08:13:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:18,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113657365] [2025-02-08 08:13:18,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:18,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:19,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:19,106 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:19,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:19,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:19,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:19,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113657365] [2025-02-08 08:13:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113657365] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:19,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799574600] [2025-02-08 08:13:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:19,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:13:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:19,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:13:19,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:13:19,302 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 105 [2025-02-08 08:13:19,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2025-02-08 08:13:19,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:19,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 105 [2025-02-08 08:13:19,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:19,761 INFO L124 PetriNetUnfolderBase]: 2432/4805 cut-off events. [2025-02-08 08:13:19,762 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2025-02-08 08:13:19,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8842 conditions, 4805 events. 2432/4805 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 35886 event pairs, 197 based on Foata normal form. 0/2982 useless extension candidates. Maximal degree in co-relation 8837. Up to 3501 conditions per place. [2025-02-08 08:13:19,782 INFO L140 encePairwiseOnDemand]: 91/105 looper letters, 91 selfloop transitions, 8 changer transitions 0/131 dead transitions. [2025-02-08 08:13:19,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 475 flow [2025-02-08 08:13:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:13:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:13:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2025-02-08 08:13:19,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2025-02-08 08:13:19,784 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 182 flow. Second operand 3 states and 204 transitions. [2025-02-08 08:13:19,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 475 flow [2025-02-08 08:13:19,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 475 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:19,789 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 254 flow [2025-02-08 08:13:19,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2025-02-08 08:13:19,791 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -12 predicate places. [2025-02-08 08:13:19,791 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 254 flow [2025-02-08 08:13:19,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2025-02-08 08:13:19,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:19,792 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:13:19,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:13:19,792 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:13:19,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash 359777708, now seen corresponding path program 1 times [2025-02-08 08:13:19,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:19,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653918246] [2025-02-08 08:13:19,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:19,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:19,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:19,945 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:19,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:19,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:20,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653918246] [2025-02-08 08:13:20,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653918246] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:20,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:20,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:20,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867309559] [2025-02-08 08:13:20,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:20,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:13:20,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:20,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:13:20,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:13:20,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 105 [2025-02-08 08:13:20,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2025-02-08 08:13:20,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:20,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 105 [2025-02-08 08:13:20,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:20,435 INFO L124 PetriNetUnfolderBase]: 1889/3860 cut-off events. [2025-02-08 08:13:20,436 INFO L125 PetriNetUnfolderBase]: For 597/603 co-relation queries the response was YES. [2025-02-08 08:13:20,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7743 conditions, 3860 events. 1889/3860 cut-off events. For 597/603 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 28209 event pairs, 181 based on Foata normal form. 351/2856 useless extension candidates. Maximal degree in co-relation 7736. Up to 2776 conditions per place. [2025-02-08 08:13:20,455 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 69 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2025-02-08 08:13:20,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 110 transitions, 437 flow [2025-02-08 08:13:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:13:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:13:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2025-02-08 08:13:20,457 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2025-02-08 08:13:20,457 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 254 flow. Second operand 3 states and 183 transitions. [2025-02-08 08:13:20,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 110 transitions, 437 flow [2025-02-08 08:13:20,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 110 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:13:20,466 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 232 flow [2025-02-08 08:13:20,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2025-02-08 08:13:20,467 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -18 predicate places. [2025-02-08 08:13:20,467 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 232 flow [2025-02-08 08:13:20,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2025-02-08 08:13:20,467 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:20,467 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-02-08 08:13:20,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:13:20,467 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-08 08:13:20,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 20390142, now seen corresponding path program 1 times [2025-02-08 08:13:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046002732] [2025-02-08 08:13:20,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:20,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:13:20,748 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:13:20,748 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:20,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:20,748 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-08 08:13:20,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:13:20,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:13:20,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:20,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-08 08:13:20,775 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-08 08:13:20,775 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-08 08:13:20,775 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (88 of 89 remaining) [2025-02-08 08:13:20,775 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 89 remaining) [2025-02-08 08:13:20,775 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 89 remaining) [2025-02-08 08:13:20,775 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 89 remaining) [2025-02-08 08:13:20,775 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 89 remaining) [2025-02-08 08:13:20,775 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 89 remaining) [2025-02-08 08:13:20,775 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 89 remaining) [2025-02-08 08:13:20,776 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 89 remaining) [2025-02-08 08:13:20,776 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 89 remaining) [2025-02-08 08:13:20,776 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (79 of 89 remaining) [2025-02-08 08:13:20,776 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 89 remaining) [2025-02-08 08:13:20,776 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 89 remaining) [2025-02-08 08:13:20,776 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 89 remaining) [2025-02-08 08:13:20,776 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (74 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (71 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 89 remaining) [2025-02-08 08:13:20,778 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (58 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (49 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (44 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (41 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 89 remaining) [2025-02-08 08:13:20,779 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 89 remaining) [2025-02-08 08:13:20,780 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (20 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 89 remaining) [2025-02-08 08:13:20,783 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (15 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (12 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 89 remaining) [2025-02-08 08:13:20,784 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 89 remaining) [2025-02-08 08:13:20,785 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 89 remaining) [2025-02-08 08:13:20,785 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 89 remaining) [2025-02-08 08:13:20,785 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 89 remaining) [2025-02-08 08:13:20,785 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 89 remaining) [2025-02-08 08:13:20,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:13:20,785 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2025-02-08 08:13:20,786 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-08 08:13:20,786 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-02-08 08:13:20,851 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-08 08:13:20,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 326 flow [2025-02-08 08:13:20,872 INFO L124 PetriNetUnfolderBase]: 6/168 cut-off events. [2025-02-08 08:13:20,872 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-08 08:13:20,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 168 events. 6/168 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 796 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. [2025-02-08 08:13:20,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 326 flow [2025-02-08 08:13:20,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 154 transitions, 326 flow [2025-02-08 08:13:20,876 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:13:20,876 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;@34bbd06a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:13:20,876 INFO L334 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2025-02-08 08:13:20,878 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:13:20,878 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-08 08:13:20,878 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:13:20,878 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:20,878 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:13:20,878 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2025-02-08 08:13:20,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:20,878 INFO L85 PathProgramCache]: Analyzing trace with hash 741502, now seen corresponding path program 1 times [2025-02-08 08:13:20,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:20,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829162624] [2025-02-08 08:13:20,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:21,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:13:21,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:13:21,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:21,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:21,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:21,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829162624] [2025-02-08 08:13:21,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829162624] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:21,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:21,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:21,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68732089] [2025-02-08 08:13:21,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:21,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 08:13:21,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:21,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 08:13:21,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 08:13:21,038 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 154 [2025-02-08 08:13:21,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 154 transitions, 326 flow. Second operand has 2 states, 2 states have (on average 60.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2025-02-08 08:13:21,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:21,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 154 [2025-02-08 08:13:21,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:28,983 INFO L124 PetriNetUnfolderBase]: 76798/133476 cut-off events. [2025-02-08 08:13:28,984 INFO L125 PetriNetUnfolderBase]: For 2945/2945 co-relation queries the response was YES. [2025-02-08 08:13:29,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241279 conditions, 133476 events. 76798/133476 cut-off events. For 2945/2945 co-relation queries the response was YES. Maximal size of possible extension queue 5046. Compared 1385190 event pairs, 72700 based on Foata normal form. 4098/69056 useless extension candidates. Maximal degree in co-relation 25552. Up to 105970 conditions per place. [2025-02-08 08:13:29,943 INFO L140 encePairwiseOnDemand]: 141/154 looper letters, 69 selfloop transitions, 0 changer transitions 0/127 dead transitions. [2025-02-08 08:13:29,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 127 transitions, 410 flow [2025-02-08 08:13:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 08:13:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-08 08:13:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 200 transitions. [2025-02-08 08:13:29,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6493506493506493 [2025-02-08 08:13:29,945 INFO L175 Difference]: Start difference. First operand has 155 places, 154 transitions, 326 flow. Second operand 2 states and 200 transitions. [2025-02-08 08:13:29,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 127 transitions, 410 flow [2025-02-08 08:13:29,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 127 transitions, 408 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:29,948 INFO L231 Difference]: Finished difference. Result has 132 places, 127 transitions, 270 flow [2025-02-08 08:13:29,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=270, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2025-02-08 08:13:29,953 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, -23 predicate places. [2025-02-08 08:13:29,953 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 270 flow [2025-02-08 08:13:29,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 60.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2025-02-08 08:13:29,953 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:29,953 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:13:29,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:13:29,953 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2025-02-08 08:13:29,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash 622092604, now seen corresponding path program 1 times [2025-02-08 08:13:29,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:29,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164511218] [2025-02-08 08:13:29,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:29,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:30,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:30,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:30,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:30,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:30,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:30,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164511218] [2025-02-08 08:13:30,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164511218] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:30,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:30,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:13:30,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646821811] [2025-02-08 08:13:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:30,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:13:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:30,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:13:30,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:13:30,317 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 154 [2025-02-08 08:13:30,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-02-08 08:13:30,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:30,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 154 [2025-02-08 08:13:30,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:13:37,673 INFO L124 PetriNetUnfolderBase]: 69484/117132 cut-off events. [2025-02-08 08:13:37,673 INFO L125 PetriNetUnfolderBase]: For 1266/1266 co-relation queries the response was YES. [2025-02-08 08:13:37,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214271 conditions, 117132 events. 69484/117132 cut-off events. For 1266/1266 co-relation queries the response was YES. Maximal size of possible extension queue 4407. Compared 1149735 event pairs, 7606 based on Foata normal form. 4167/66059 useless extension candidates. Maximal degree in co-relation 214265. Up to 87171 conditions per place. [2025-02-08 08:13:38,377 INFO L140 encePairwiseOnDemand]: 146/154 looper letters, 111 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2025-02-08 08:13:38,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 586 flow [2025-02-08 08:13:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:13:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:13:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2025-02-08 08:13:38,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6147186147186147 [2025-02-08 08:13:38,379 INFO L175 Difference]: Start difference. First operand has 132 places, 127 transitions, 270 flow. Second operand 3 states and 284 transitions. [2025-02-08 08:13:38,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 586 flow [2025-02-08 08:13:38,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 167 transitions, 586 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-08 08:13:38,382 INFO L231 Difference]: Finished difference. Result has 128 places, 121 transitions, 262 flow [2025-02-08 08:13:38,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=128, PETRI_TRANSITIONS=121} [2025-02-08 08:13:38,382 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, -27 predicate places. [2025-02-08 08:13:38,383 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 121 transitions, 262 flow [2025-02-08 08:13:38,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-02-08 08:13:38,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:13:38,383 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:13:38,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:13:38,383 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2025-02-08 08:13:38,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:13:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash 622092605, now seen corresponding path program 1 times [2025-02-08 08:13:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:13:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931066628] [2025-02-08 08:13:38,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:13:38,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:13:38,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:13:38,686 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:13:38,686 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:13:38,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:13:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:13:38,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:13:38,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931066628] [2025-02-08 08:13:38,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931066628] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:13:38,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:13:38,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:13:38,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050806954] [2025-02-08 08:13:38,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:13:38,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:13:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:13:38,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:13:38,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:13:38,707 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 154 [2025-02-08 08:13:38,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 121 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2025-02-08 08:13:38,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:13:38,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 154 [2025-02-08 08:13:38,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand