./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 c00e63dc 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-?-c00e63d-m [2025-02-06 12:37:08,465 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 12:37:08,512 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 12:37:08,516 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 12:37:08,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 12:37:08,530 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 12:37:08,530 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 12:37:08,530 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 12:37:08,532 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 12:37:08,532 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 12:37:08,532 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 12:37:08,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 12:37:08,532 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 12:37:08,533 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 12:37:08,533 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 12:37:08,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 12:37:08,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:37:08,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 12:37:08,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 12:37:08,534 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 12:37:08,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 12:37:08,534 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 12:37:08,534 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 12:37:08,534 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 12:37:08,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 12:37:08,534 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 [2025-02-06 12:37:08,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 12:37:08,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 12:37:08,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 12:37:08,774 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 12:37:08,774 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 12:37:08,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2025-02-06 12:37:09,896 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c4112735/e309fe66bf8b4063a064bcced792f7b5/FLAGfba4cea72 [2025-02-06 12:37:10,213 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 12:37:10,215 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2025-02-06 12:37:10,229 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c4112735/e309fe66bf8b4063a064bcced792f7b5/FLAGfba4cea72 [2025-02-06 12:37:10,245 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c4112735/e309fe66bf8b4063a064bcced792f7b5 [2025-02-06 12:37:10,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 12:37:10,248 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 12:37:10,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 12:37:10,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 12:37:10,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 12:37:10,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d4caa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10, skipping insertion in model container [2025-02-06 12:37:10,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,281 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 12:37:10,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:37:10,522 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 12:37:10,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 12:37:10,585 INFO L204 MainTranslator]: Completed translation [2025-02-06 12:37:10,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10 WrapperNode [2025-02-06 12:37:10,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 12:37:10,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 12:37:10,586 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 12:37:10,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 12:37:10,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,612 INFO L138 Inliner]: procedures = 172, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 162 [2025-02-06 12:37:10,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 12:37:10,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 12:37:10,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 12:37:10,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 12:37:10,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,623 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,637 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 5, 3, 6]. 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]. [2025-02-06 12:37:10,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,644 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,648 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,649 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,653 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 12:37:10,655 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 12:37:10,655 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 12:37:10,655 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 12:37:10,656 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (1/1) ... [2025-02-06 12:37:10,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 12:37:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 12:37:10,681 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) [2025-02-06 12:37:10,687 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 [2025-02-06 12:37:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 12:37:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 12:37:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 12:37:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-06 12:37:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-02-06 12:37:10,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 12:37:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 12:37:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 12:37:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-06 12:37:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 12:37:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 12:37:10,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 12:37:10,706 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 12:37:10,808 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 12:37:10,809 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 12:37:11,071 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 12:37:11,071 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 12:37:11,444 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 12:37:11,445 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 12:37:11,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:37:11 BoogieIcfgContainer [2025-02-06 12:37:11,446 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 12:37:11,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 12:37:11,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 12:37:11,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 12:37:11,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 12:37:10" (1/3) ... [2025-02-06 12:37:11,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625eef04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:37:11, skipping insertion in model container [2025-02-06 12:37:11,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 12:37:10" (2/3) ... [2025-02-06 12:37:11,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625eef04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 12:37:11, skipping insertion in model container [2025-02-06 12:37:11,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 12:37:11" (3/3) ... [2025-02-06 12:37:11,453 INFO L128 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2025-02-06 12:37:11,464 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 12:37:11,465 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. [2025-02-06 12:37:11,466 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 12:37:11,525 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 12:37:11,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 57 transitions, 118 flow [2025-02-06 12:37:11,586 INFO L124 PetriNetUnfolderBase]: 3/61 cut-off events. [2025-02-06 12:37:11,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:37:11,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 61 events. 3/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 152 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2025-02-06 12:37:11,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 57 transitions, 118 flow [2025-02-06 12:37:11,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 57 transitions, 118 flow [2025-02-06 12:37:11,603 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:37:11,614 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;@6816ae91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:37:11,615 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2025-02-06 12:37:11,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:37:11,619 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-06 12:37:11,619 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:37:11,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:37:11,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:37:11,620 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 12:37:11,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:37:11,626 INFO L85 PathProgramCache]: Analyzing trace with hash 485332, now seen corresponding path program 1 times [2025-02-06 12:37:11,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:37:11,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570738904] [2025-02-06 12:37:11,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:37:11,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:37:11,972 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:37:11,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:37:11,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:11,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:37:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:37:12,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:37:12,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570738904] [2025-02-06 12:37:12,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570738904] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:37:12,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:37:12,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:37:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074711115] [2025-02-06 12:37:12,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:37:12,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 12:37:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:37:12,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 12:37:12,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 12:37:12,104 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2025-02-06 12:37:12,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 118 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) [2025-02-06 12:37:12,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:37:12,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2025-02-06 12:37:12,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:37:12,195 INFO L124 PetriNetUnfolderBase]: 55/191 cut-off events. [2025-02-06 12:37:12,195 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:37:12,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 191 events. 55/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 712 event pairs, 49 based on Foata normal form. 3/118 useless extension candidates. Maximal degree in co-relation 317. Up to 135 conditions per place. [2025-02-06 12:37:12,199 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 30 selfloop transitions, 0 changer transitions 0/50 dead transitions. [2025-02-06 12:37:12,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 164 flow [2025-02-06 12:37:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 12:37:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-06 12:37:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2025-02-06 12:37:12,213 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6754385964912281 [2025-02-06 12:37:12,214 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 118 flow. Second operand 2 states and 77 transitions. [2025-02-06 12:37:12,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 164 flow [2025-02-06 12:37:12,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:37:12,221 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 104 flow [2025-02-06 12:37:12,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2025-02-06 12:37:12,225 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2025-02-06 12:37:12,230 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 104 flow [2025-02-06 12:37:12,231 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) [2025-02-06 12:37:12,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:37:12,231 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 12:37:12,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 12:37:12,231 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-02-06 12:37:12,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:37:12,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1576549118, now seen corresponding path program 1 times [2025-02-06 12:37:12,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:37:12,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173990534] [2025-02-06 12:37:12,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:37:12,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:37:12,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:37:12,472 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:37:12,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:12,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:37:12,475 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 12:37:12,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:37:12,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:37:12,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:12,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:37:12,518 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 12:37:12,518 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 12:37:12,520 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (59 of 60 remaining) [2025-02-06 12:37:12,521 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 60 remaining) [2025-02-06 12:37:12,521 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 60 remaining) [2025-02-06 12:37:12,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 60 remaining) [2025-02-06 12:37:12,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 60 remaining) [2025-02-06 12:37:12,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 60 remaining) [2025-02-06 12:37:12,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 60 remaining) [2025-02-06 12:37:12,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 60 remaining) [2025-02-06 12:37:12,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 60 remaining) [2025-02-06 12:37:12,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (50 of 60 remaining) [2025-02-06 12:37:12,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 60 remaining) [2025-02-06 12:37:12,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 60 remaining) [2025-02-06 12:37:12,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 60 remaining) [2025-02-06 12:37:12,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 60 remaining) [2025-02-06 12:37:12,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 60 remaining) [2025-02-06 12:37:12,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 60 remaining) [2025-02-06 12:37:12,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (43 of 60 remaining) [2025-02-06 12:37:12,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (42 of 60 remaining) [2025-02-06 12:37:12,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 60 remaining) [2025-02-06 12:37:12,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 60 remaining) [2025-02-06 12:37:12,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 60 remaining) [2025-02-06 12:37:12,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 60 remaining) [2025-02-06 12:37:12,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 60 remaining) [2025-02-06 12:37:12,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 60 remaining) [2025-02-06 12:37:12,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 60 remaining) [2025-02-06 12:37:12,524 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 60 remaining) [2025-02-06 12:37:12,525 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 60 remaining) [2025-02-06 12:37:12,525 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 60 remaining) [2025-02-06 12:37:12,525 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 60 remaining) [2025-02-06 12:37:12,525 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 60 remaining) [2025-02-06 12:37:12,526 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (29 of 60 remaining) [2025-02-06 12:37:12,526 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (20 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (13 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (12 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 60 remaining) [2025-02-06 12:37:12,527 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 60 remaining) [2025-02-06 12:37:12,528 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 60 remaining) [2025-02-06 12:37:12,528 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 60 remaining) [2025-02-06 12:37:12,528 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 60 remaining) [2025-02-06 12:37:12,528 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 60 remaining) [2025-02-06 12:37:12,528 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 60 remaining) [2025-02-06 12:37:12,528 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 60 remaining) [2025-02-06 12:37:12,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 12:37:12,528 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-06 12:37:12,531 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 12:37:12,532 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-06 12:37:12,579 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 12:37:12,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 107 transitions, 224 flow [2025-02-06 12:37:12,607 INFO L124 PetriNetUnfolderBase]: 6/116 cut-off events. [2025-02-06 12:37:12,608 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 12:37:12,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 116 events. 6/116 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 452 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 103. Up to 3 conditions per place. [2025-02-06 12:37:12,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 107 transitions, 224 flow [2025-02-06 12:37:12,613 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 107 transitions, 224 flow [2025-02-06 12:37:12,614 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:37:12,614 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;@6816ae91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:37:12,614 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-02-06 12:37:12,616 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:37:12,616 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-06 12:37:12,616 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:37:12,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:37:12,616 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:37:12,616 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 12:37:12,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:37:12,616 INFO L85 PathProgramCache]: Analyzing trace with hash 591583, now seen corresponding path program 1 times [2025-02-06 12:37:12,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:37:12,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158871125] [2025-02-06 12:37:12,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:37:12,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:37:12,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:37:12,805 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:37:12,805 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:12,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:37:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:37:12,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:37:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158871125] [2025-02-06 12:37:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158871125] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:37:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:37:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:37:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738932596] [2025-02-06 12:37:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:37:12,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 12:37:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:37:12,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 12:37:12,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 12:37:12,821 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 107 [2025-02-06 12:37:12,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 224 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) [2025-02-06 12:37:12,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:37:12,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 107 [2025-02-06 12:37:12,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:37:13,568 INFO L124 PetriNetUnfolderBase]: 3609/7017 cut-off events. [2025-02-06 12:37:13,569 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2025-02-06 12:37:13,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12815 conditions, 7017 events. 3609/7017 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 53293 event pairs, 3291 based on Foata normal form. 159/3915 useless extension candidates. Maximal degree in co-relation 11881. Up to 5715 conditions per place. [2025-02-06 12:37:13,613 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 57 selfloop transitions, 0 changer transitions 0/96 dead transitions. [2025-02-06 12:37:13,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 316 flow [2025-02-06 12:37:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 12:37:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-06 12:37:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 146 transitions. [2025-02-06 12:37:13,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6822429906542056 [2025-02-06 12:37:13,614 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 224 flow. Second operand 2 states and 146 transitions. [2025-02-06 12:37:13,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 316 flow [2025-02-06 12:37:13,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:37:13,616 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 202 flow [2025-02-06 12:37:13,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=202, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2025-02-06 12:37:13,617 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2025-02-06 12:37:13,617 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 202 flow [2025-02-06 12:37:13,617 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) [2025-02-06 12:37:13,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:37:13,618 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:37:13,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 12:37:13,618 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 12:37:13,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:37:13,618 INFO L85 PathProgramCache]: Analyzing trace with hash 448557866, now seen corresponding path program 1 times [2025-02-06 12:37:13,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:37:13,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122953456] [2025-02-06 12:37:13,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:37:13,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:37:13,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:37:13,843 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:37:13,843 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:13,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:37:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:37:13,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:37:13,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122953456] [2025-02-06 12:37:13,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122953456] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:37:13,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:37:13,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:37:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226720303] [2025-02-06 12:37:13,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:37:13,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:37:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:37:13,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:37:13,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:37:13,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 107 [2025-02-06 12:37:13,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 202 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) [2025-02-06 12:37:13,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:37:13,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 107 [2025-02-06 12:37:13,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:37:14,943 INFO L124 PetriNetUnfolderBase]: 7152/13363 cut-off events. [2025-02-06 12:37:14,943 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2025-02-06 12:37:14,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24739 conditions, 13363 events. 7152/13363 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 102660 event pairs, 2576 based on Foata normal form. 0/7632 useless extension candidates. Maximal degree in co-relation 24734. Up to 6474 conditions per place. [2025-02-06 12:37:15,008 INFO L140 encePairwiseOnDemand]: 93/107 looper letters, 106 selfloop transitions, 8 changer transitions 0/146 dead transitions. [2025-02-06 12:37:15,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 535 flow [2025-02-06 12:37:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:37:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:37:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2025-02-06 12:37:15,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6822429906542056 [2025-02-06 12:37:15,011 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 202 flow. Second operand 3 states and 219 transitions. [2025-02-06 12:37:15,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 535 flow [2025-02-06 12:37:15,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 146 transitions, 535 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 12:37:15,016 INFO L231 Difference]: Finished difference. Result has 102 places, 103 transitions, 274 flow [2025-02-06 12:37:15,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=102, PETRI_TRANSITIONS=103} [2025-02-06 12:37:15,016 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -4 predicate places. [2025-02-06 12:37:15,016 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 103 transitions, 274 flow [2025-02-06 12:37:15,016 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) [2025-02-06 12:37:15,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:37:15,017 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:37:15,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 12:37:15,017 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 12:37:15,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:37:15,017 INFO L85 PathProgramCache]: Analyzing trace with hash 448557867, now seen corresponding path program 1 times [2025-02-06 12:37:15,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:37:15,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890693531] [2025-02-06 12:37:15,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:37:15,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:37:15,212 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:37:15,232 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:37:15,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:15,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:37:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:37:15,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:37:15,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890693531] [2025-02-06 12:37:15,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890693531] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:37:15,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:37:15,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:37:15,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718582900] [2025-02-06 12:37:15,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:37:15,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:37:15,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:37:15,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:37:15,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:37:15,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 107 [2025-02-06 12:37:15,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 103 transitions, 274 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) [2025-02-06 12:37:15,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:37:15,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 107 [2025-02-06 12:37:15,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:37:16,314 INFO L124 PetriNetUnfolderBase]: 5509/10797 cut-off events. [2025-02-06 12:37:16,314 INFO L125 PetriNetUnfolderBase]: For 1474/1549 co-relation queries the response was YES. [2025-02-06 12:37:16,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21293 conditions, 10797 events. 5509/10797 cut-off events. For 1474/1549 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 83800 event pairs, 1883 based on Foata normal form. 786/7351 useless extension candidates. Maximal degree in co-relation 21286. Up to 7271 conditions per place. [2025-02-06 12:37:16,366 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 85 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2025-02-06 12:37:16,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 126 transitions, 503 flow [2025-02-06 12:37:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 12:37:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 12:37:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2025-02-06 12:37:16,368 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.616822429906542 [2025-02-06 12:37:16,368 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 274 flow. Second operand 3 states and 198 transitions. [2025-02-06 12:37:16,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 126 transitions, 503 flow [2025-02-06 12:37:16,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 126 transitions, 487 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 12:37:16,374 INFO L231 Difference]: Finished difference. Result has 96 places, 97 transitions, 252 flow [2025-02-06 12:37:16,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=96, PETRI_TRANSITIONS=97} [2025-02-06 12:37:16,375 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2025-02-06 12:37:16,375 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 97 transitions, 252 flow [2025-02-06 12:37:16,375 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) [2025-02-06 12:37:16,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:37:16,375 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-02-06 12:37:16,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 12:37:16,375 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-02-06 12:37:16,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:37:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1230536222, now seen corresponding path program 1 times [2025-02-06 12:37:16,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:37:16,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926914269] [2025-02-06 12:37:16,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:37:16,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:37:16,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:37:16,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:37:16,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:16,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:37:16,579 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 12:37:16,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 12:37:16,588 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 12:37:16,588 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:16,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 12:37:16,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 12:37:16,594 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 12:37:16,594 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (88 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (79 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 89 remaining) [2025-02-06 12:37:16,595 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (72 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (71 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (58 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 89 remaining) [2025-02-06 12:37:16,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (49 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (42 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (41 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 89 remaining) [2025-02-06 12:37:16,597 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (20 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 89 remaining) [2025-02-06 12:37:16,598 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (13 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15ASSERT_VIOLATIONARRAY_INDEX (12 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 89 remaining) [2025-02-06 12:37:16,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 89 remaining) [2025-02-06 12:37:16,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 12:37:16,600 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2025-02-06 12:37:16,600 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 12:37:16,600 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-02-06 12:37:16,657 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 12:37:16,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 157 transitions, 332 flow [2025-02-06 12:37:16,671 INFO L124 PetriNetUnfolderBase]: 9/171 cut-off events. [2025-02-06 12:37:16,671 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-02-06 12:37:16,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 9/171 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 804 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 152. Up to 4 conditions per place. [2025-02-06 12:37:16,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 157 transitions, 332 flow [2025-02-06 12:37:16,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 157 transitions, 332 flow [2025-02-06 12:37:16,674 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 12:37:16,674 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;@6816ae91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 12:37:16,674 INFO L334 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2025-02-06 12:37:16,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 12:37:16,675 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2025-02-06 12:37:16,675 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 12:37:16,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:37:16,675 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 12:37:16,675 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2025-02-06 12:37:16,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:37:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash 747484, now seen corresponding path program 1 times [2025-02-06 12:37:16,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:37:16,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835187737] [2025-02-06 12:37:16,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:37:16,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:37:16,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 12:37:16,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 12:37:16,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:16,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:37:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:37:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:37:16,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835187737] [2025-02-06 12:37:16,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835187737] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:37:16,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:37:16,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:37:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970924176] [2025-02-06 12:37:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:37:16,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 12:37:16,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:37:16,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 12:37:16,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 12:37:16,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 157 [2025-02-06 12:37:16,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 157 transitions, 332 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) [2025-02-06 12:37:16,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:37:16,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 157 [2025-02-06 12:37:16,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 12:37:30,814 INFO L124 PetriNetUnfolderBase]: 150765/233063 cut-off events. [2025-02-06 12:37:30,815 INFO L125 PetriNetUnfolderBase]: For 4370/4370 co-relation queries the response was YES. [2025-02-06 12:37:31,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441408 conditions, 233063 events. 150765/233063 cut-off events. For 4370/4370 co-relation queries the response was YES. Maximal size of possible extension queue 6744. Compared 2148899 event pairs, 138281 based on Foata normal form. 6241/123817 useless extension candidates. Maximal degree in co-relation 88809. Up to 205557 conditions per place. [2025-02-06 12:37:32,185 INFO L140 encePairwiseOnDemand]: 144/157 looper letters, 84 selfloop transitions, 0 changer transitions 0/142 dead transitions. [2025-02-06 12:37:32,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 142 transitions, 470 flow [2025-02-06 12:37:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 12:37:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-02-06 12:37:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 215 transitions. [2025-02-06 12:37:32,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6847133757961783 [2025-02-06 12:37:32,187 INFO L175 Difference]: Start difference. First operand has 155 places, 157 transitions, 332 flow. Second operand 2 states and 215 transitions. [2025-02-06 12:37:32,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 142 transitions, 470 flow [2025-02-06 12:37:32,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 142 transitions, 468 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-02-06 12:37:32,194 INFO L231 Difference]: Finished difference. Result has 144 places, 142 transitions, 300 flow [2025-02-06 12:37:32,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=300, PETRI_PLACES=144, PETRI_TRANSITIONS=142} [2025-02-06 12:37:32,196 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, -11 predicate places. [2025-02-06 12:37:32,197 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 142 transitions, 300 flow [2025-02-06 12:37:32,197 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) [2025-02-06 12:37:32,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 12:37:32,200 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 12:37:32,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 12:37:32,201 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 115 more)] === [2025-02-06 12:37:32,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 12:37:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash 799652921, now seen corresponding path program 1 times [2025-02-06 12:37:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 12:37:32,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102431172] [2025-02-06 12:37:32,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 12:37:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 12:37:32,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 12:37:32,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 12:37:32,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 12:37:32,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 12:37:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 12:37:32,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 12:37:32,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102431172] [2025-02-06 12:37:32,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102431172] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 12:37:32,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 12:37:32,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 12:37:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919077374] [2025-02-06 12:37:32,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 12:37:32,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 12:37:32,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 12:37:32,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 12:37:32,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 12:37:32,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 157 [2025-02-06 12:37:32,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 142 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2025-02-06 12:37:32,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 12:37:32,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 157 [2025-02-06 12:37:32,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand