./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 d05018e114128995041419dca600f2451b0df342be45761a900c0d0704b1b40b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:29:03,450 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:29:03,504 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:29:03,507 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:29:03,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:29:03,536 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:29:03,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:29:03,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:29:03,537 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:29:03,538 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:29:03,538 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:29:03,539 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:29:03,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:29:03,540 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:29:03,540 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:29:03,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:29:03,542 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:29:03,542 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:29:03,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:29:03,543 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:29:03,543 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:29:03,543 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:29:03,544 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:29:03,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:29:03,544 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:29:03,545 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:29:03,545 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:29:03,545 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:29:03,545 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:29:03,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:29:03,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:29:03,546 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:29:03,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:29:03,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:29:03,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:29:03,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:29:03,547 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:29:03,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:29:03,547 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:29:03,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:29:03,548 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:29:03,548 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:29:03,551 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d05018e114128995041419dca600f2451b0df342be45761a900c0d0704b1b40b [2024-10-11 19:29:03,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:29:03,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:29:03,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:29:03,764 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:29:03,764 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:29:03,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-10-11 19:29:05,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:29:05,193 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:29:05,194 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-10-11 19:29:05,206 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f8ca06cc0/4eee866cebc3467196af41a66f93625e/FLAG814f4e55f [2024-10-11 19:29:05,217 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f8ca06cc0/4eee866cebc3467196af41a66f93625e [2024-10-11 19:29:05,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:29:05,220 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:29:05,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:29:05,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:29:05,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:29:05,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19077154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05, skipping insertion in model container [2024-10-11 19:29:05,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,266 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:29:05,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:29:05,554 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:29:05,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:29:05,644 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:29:05,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05 WrapperNode [2024-10-11 19:29:05,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:29:05,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:29:05,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:29:05,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:29:05,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,664 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,679 INFO L138 Inliner]: procedures = 173, calls = 28, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 88 [2024-10-11 19:29:05,679 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:29:05,680 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:29:05,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:29:05,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:29:05,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,689 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,704 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 2 writes are split as follows [0, 2]. [2024-10-11 19:29:05,704 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,705 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,708 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,711 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:29:05,717 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:29:05,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:29:05,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:29:05,718 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (1/1) ... [2024-10-11 19:29:05,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:29:05,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:29:05,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:29:05,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:29:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:29:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:29:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 19:29:05,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 19:29:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:29:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:29:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 19:29:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:29:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 19:29:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 19:29:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:29:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:29:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 19:29:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:29:05,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:29:05,799 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:29:05,926 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:29:05,928 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:29:06,131 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:29:06,131 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:29:06,234 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:29:06,235 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 19:29:06,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:29:06 BoogieIcfgContainer [2024-10-11 19:29:06,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:29:06,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:29:06,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:29:06,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:29:06,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:29:05" (1/3) ... [2024-10-11 19:29:06,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389ea379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:29:06, skipping insertion in model container [2024-10-11 19:29:06,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:29:05" (2/3) ... [2024-10-11 19:29:06,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389ea379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:29:06, skipping insertion in model container [2024-10-11 19:29:06,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:29:06" (3/3) ... [2024-10-11 19:29:06,244 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2024-10-11 19:29:06,258 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:29:06,258 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-11 19:29:06,258 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:29:06,306 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:29:06,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 84 flow [2024-10-11 19:29:06,355 INFO L124 PetriNetUnfolderBase]: 2/44 cut-off events. [2024-10-11 19:29:06,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:29:06,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 44 events. 2/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 91 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-10-11 19:29:06,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 84 flow [2024-10-11 19:29:06,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 84 flow [2024-10-11 19:29:06,369 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:29:06,374 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;@14516013, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:29:06,375 INFO L334 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-10-11 19:29:06,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:29:06,377 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:29:06,377 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:29:06,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:06,378 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:29:06,378 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-11 19:29:06,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 338830, now seen corresponding path program 1 times [2024-10-11 19:29:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:06,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424608887] [2024-10-11 19:29:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:06,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:29:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:29:06,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:29:06,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424608887] [2024-10-11 19:29:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424608887] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:29:06,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:29:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:29:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167863879] [2024-10-11 19:29:06,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:29:06,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:29:06,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:29:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:29:06,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:29:06,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-11 19:29:06,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 84 flow. Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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) [2024-10-11 19:29:06,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:29:06,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-11 19:29:06,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:29:06,661 INFO L124 PetriNetUnfolderBase]: 36/130 cut-off events. [2024-10-11 19:29:06,664 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:29:06,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 130 events. 36/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 421 event pairs, 33 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 213. Up to 92 conditions per place. [2024-10-11 19:29:06,667 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 21 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2024-10-11 19:29:06,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 116 flow [2024-10-11 19:29:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:29:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:29:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2024-10-11 19:29:06,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-10-11 19:29:06,679 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 84 flow. Second operand 2 states and 54 transitions. [2024-10-11 19:29:06,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 116 flow [2024-10-11 19:29:06,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:29:06,684 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 74 flow [2024-10-11 19:29:06,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-10-11 19:29:06,690 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-10-11 19:29:06,691 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 74 flow [2024-10-11 19:29:06,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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) [2024-10-11 19:29:06,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:06,691 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-11 19:29:06,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:29:06,691 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-11 19:29:06,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1504693468, now seen corresponding path program 1 times [2024-10-11 19:29:06,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:06,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147164428] [2024-10-11 19:29:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:06,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:29:06,714 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:29:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:29:06,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:29:06,744 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:29:06,745 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2024-10-11 19:29:06,747 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2024-10-11 19:29:06,749 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2024-10-11 19:29:06,750 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2024-10-11 19:29:06,751 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2024-10-11 19:29:06,751 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2024-10-11 19:29:06,752 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2024-10-11 19:29:06,752 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2024-10-11 19:29:06,752 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2024-10-11 19:29:06,752 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (22 of 32 remaining) [2024-10-11 19:29:06,752 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (21 of 32 remaining) [2024-10-11 19:29:06,752 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2024-10-11 19:29:06,753 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2024-10-11 19:29:06,753 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 32 remaining) [2024-10-11 19:29:06,753 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2024-10-11 19:29:06,754 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2024-10-11 19:29:06,754 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (15 of 32 remaining) [2024-10-11 19:29:06,754 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2024-10-11 19:29:06,754 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2024-10-11 19:29:06,754 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2024-10-11 19:29:06,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2024-10-11 19:29:06,755 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2024-10-11 19:29:06,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2024-10-11 19:29:06,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2024-10-11 19:29:06,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2024-10-11 19:29:06,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 32 remaining) [2024-10-11 19:29:06,756 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (5 of 32 remaining) [2024-10-11 19:29:06,757 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2024-10-11 19:29:06,757 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2024-10-11 19:29:06,757 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (2 of 32 remaining) [2024-10-11 19:29:06,757 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2024-10-11 19:29:06,758 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2024-10-11 19:29:06,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:29:06,759 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 19:29:06,761 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:29:06,762 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:29:06,806 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:29:06,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 156 flow [2024-10-11 19:29:06,826 INFO L124 PetriNetUnfolderBase]: 4/82 cut-off events. [2024-10-11 19:29:06,826 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:29:06,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 82 events. 4/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 284 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 69. Up to 3 conditions per place. [2024-10-11 19:29:06,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 156 flow [2024-10-11 19:29:06,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 156 flow [2024-10-11 19:29:06,831 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:29:06,832 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;@14516013, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:29:06,832 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-10-11 19:29:06,833 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:29:06,833 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:29:06,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:29:06,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:06,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:29:06,834 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-11 19:29:06,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:06,834 INFO L85 PathProgramCache]: Analyzing trace with hash 411319, now seen corresponding path program 1 times [2024-10-11 19:29:06,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:06,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038102560] [2024-10-11 19:29:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:06,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:29:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:29:06,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:29:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038102560] [2024-10-11 19:29:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038102560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:29:06,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:29:06,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:29:06,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965696383] [2024-10-11 19:29:06,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:29:06,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:29:06,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:29:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:29:06,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:29:06,857 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 73 [2024-10-11 19:29:06,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 156 flow. Second operand has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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) [2024-10-11 19:29:06,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:29:06,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 73 [2024-10-11 19:29:06,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:29:07,279 INFO L124 PetriNetUnfolderBase]: 1666/3265 cut-off events. [2024-10-11 19:29:07,279 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-11 19:29:07,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6016 conditions, 3265 events. 1666/3265 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 20699 event pairs, 1555 based on Foata normal form. 0/2184 useless extension candidates. Maximal degree in co-relation 5378. Up to 2692 conditions per place. [2024-10-11 19:29:07,303 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 39 selfloop transitions, 0 changer transitions 0/66 dead transitions. [2024-10-11 19:29:07,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 220 flow [2024-10-11 19:29:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:29:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:29:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 100 transitions. [2024-10-11 19:29:07,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.684931506849315 [2024-10-11 19:29:07,305 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 156 flow. Second operand 2 states and 100 transitions. [2024-10-11 19:29:07,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 220 flow [2024-10-11 19:29:07,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:29:07,308 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 142 flow [2024-10-11 19:29:07,308 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-10-11 19:29:07,309 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -4 predicate places. [2024-10-11 19:29:07,309 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 142 flow [2024-10-11 19:29:07,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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) [2024-10-11 19:29:07,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:07,310 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 19:29:07,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:29:07,310 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-11 19:29:07,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash -629687832, now seen corresponding path program 1 times [2024-10-11 19:29:07,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:07,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612053585] [2024-10-11 19:29:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:29:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:29:07,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:29:07,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612053585] [2024-10-11 19:29:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612053585] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:29:07,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:29:07,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:29:07,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785295550] [2024-10-11 19:29:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:29:07,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:29:07,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:29:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:29:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:29:07,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 73 [2024-10-11 19:29:07,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-10-11 19:29:07,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:29:07,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 73 [2024-10-11 19:29:07,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:29:07,988 INFO L124 PetriNetUnfolderBase]: 3369/6333 cut-off events. [2024-10-11 19:29:07,988 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-11 19:29:07,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11808 conditions, 6333 events. 3369/6333 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 41382 event pairs, 1279 based on Foata normal form. 0/4534 useless extension candidates. Maximal degree in co-relation 11803. Up to 3047 conditions per place. [2024-10-11 19:29:08,022 INFO L140 encePairwiseOnDemand]: 59/73 looper letters, 71 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-10-11 19:29:08,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 373 flow [2024-10-11 19:29:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:29:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:29:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-10-11 19:29:08,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6894977168949772 [2024-10-11 19:29:08,024 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 142 flow. Second operand 3 states and 151 transitions. [2024-10-11 19:29:08,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 373 flow [2024-10-11 19:29:08,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 373 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:29:08,029 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 214 flow [2024-10-11 19:29:08,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-10-11 19:29:08,031 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-10-11 19:29:08,031 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 214 flow [2024-10-11 19:29:08,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-10-11 19:29:08,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:08,032 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 19:29:08,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:29:08,032 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-11 19:29:08,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash -629687831, now seen corresponding path program 1 times [2024-10-11 19:29:08,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:08,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211693711] [2024-10-11 19:29:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:29:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:29:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:29:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211693711] [2024-10-11 19:29:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211693711] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:29:08,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:29:08,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:29:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21105710] [2024-10-11 19:29:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:29:08,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:29:08,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:29:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:29:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:29:08,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 73 [2024-10-11 19:29:08,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-10-11 19:29:08,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:29:08,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 73 [2024-10-11 19:29:08,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:29:08,513 INFO L124 PetriNetUnfolderBase]: 2175/4320 cut-off events. [2024-10-11 19:29:08,514 INFO L125 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2024-10-11 19:29:08,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9076 conditions, 4320 events. 2175/4320 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 27382 event pairs, 780 based on Foata normal form. 540/3927 useless extension candidates. Maximal degree in co-relation 9069. Up to 2973 conditions per place. [2024-10-11 19:29:08,539 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 57 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2024-10-11 19:29:08,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 369 flow [2024-10-11 19:29:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:29:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:29:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-10-11 19:29:08,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6255707762557078 [2024-10-11 19:29:08,542 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 214 flow. Second operand 3 states and 137 transitions. [2024-10-11 19:29:08,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 369 flow [2024-10-11 19:29:08,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 353 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:29:08,552 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 192 flow [2024-10-11 19:29:08,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-10-11 19:29:08,555 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2024-10-11 19:29:08,555 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 192 flow [2024-10-11 19:29:08,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-10-11 19:29:08,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:08,555 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-11 19:29:08,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:29:08,556 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-11 19:29:08,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash 184899197, now seen corresponding path program 1 times [2024-10-11 19:29:08,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:08,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413793549] [2024-10-11 19:29:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:08,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:29:08,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:29:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:29:08,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:29:08,580 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:29:08,580 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 47 remaining) [2024-10-11 19:29:08,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (37 of 47 remaining) [2024-10-11 19:29:08,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (36 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (33 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (30 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 47 remaining) [2024-10-11 19:29:08,582 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (20 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (17 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 47 remaining) [2024-10-11 19:29:08,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 47 remaining) [2024-10-11 19:29:08,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 47 remaining) [2024-10-11 19:29:08,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 47 remaining) [2024-10-11 19:29:08,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 47 remaining) [2024-10-11 19:29:08,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 47 remaining) [2024-10-11 19:29:08,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 47 remaining) [2024-10-11 19:29:08,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 47 remaining) [2024-10-11 19:29:08,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 47 remaining) [2024-10-11 19:29:08,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (5 of 47 remaining) [2024-10-11 19:29:08,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 47 remaining) [2024-10-11 19:29:08,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 47 remaining) [2024-10-11 19:29:08,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (2 of 47 remaining) [2024-10-11 19:29:08,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 47 remaining) [2024-10-11 19:29:08,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 47 remaining) [2024-10-11 19:29:08,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:29:08,586 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-11 19:29:08,587 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:29:08,587 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 19:29:08,634 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:29:08,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 230 flow [2024-10-11 19:29:08,651 INFO L124 PetriNetUnfolderBase]: 6/120 cut-off events. [2024-10-11 19:29:08,651 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 19:29:08,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 6/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 491 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 101. Up to 4 conditions per place. [2024-10-11 19:29:08,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 106 transitions, 230 flow [2024-10-11 19:29:08,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 106 transitions, 230 flow [2024-10-11 19:29:08,655 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:29:08,656 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;@14516013, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:29:08,656 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-10-11 19:29:08,656 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:29:08,656 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:29:08,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:29:08,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:08,657 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:29:08,657 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-11 19:29:08,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash 516577, now seen corresponding path program 1 times [2024-10-11 19:29:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:08,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315453019] [2024-10-11 19:29:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:29:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:29:08,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:29:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315453019] [2024-10-11 19:29:08,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315453019] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:29:08,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:29:08,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:29:08,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454651248] [2024-10-11 19:29:08,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:29:08,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:29:08,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:29:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:29:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:29:08,671 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 106 [2024-10-11 19:29:08,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2024-10-11 19:29:08,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:29:08,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 106 [2024-10-11 19:29:08,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:29:13,809 INFO L124 PetriNetUnfolderBase]: 48556/74370 cut-off events. [2024-10-11 19:29:13,810 INFO L125 PetriNetUnfolderBase]: For 2090/2090 co-relation queries the response was YES. [2024-10-11 19:29:13,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142786 conditions, 74370 events. 48556/74370 cut-off events. For 2090/2090 co-relation queries the response was YES. Maximal size of possible extension queue 1737. Compared 562928 event pairs, 45529 based on Foata normal form. 0/49073 useless extension candidates. Maximal degree in co-relation 69546. Up to 67060 conditions per place. [2024-10-11 19:29:14,182 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 57 selfloop transitions, 0 changer transitions 0/97 dead transitions. [2024-10-11 19:29:14,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 326 flow [2024-10-11 19:29:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:29:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:29:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 146 transitions. [2024-10-11 19:29:14,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6886792452830188 [2024-10-11 19:29:14,185 INFO L175 Difference]: Start difference. First operand has 107 places, 106 transitions, 230 flow. Second operand 2 states and 146 transitions. [2024-10-11 19:29:14,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 326 flow [2024-10-11 19:29:14,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 97 transitions, 324 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 19:29:14,190 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 210 flow [2024-10-11 19:29:14,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=210, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-10-11 19:29:14,192 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -5 predicate places. [2024-10-11 19:29:14,192 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 210 flow [2024-10-11 19:29:14,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2024-10-11 19:29:14,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:14,194 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 19:29:14,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 19:29:14,194 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-11 19:29:14,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1787855480, now seen corresponding path program 1 times [2024-10-11 19:29:14,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:14,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106534675] [2024-10-11 19:29:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:14,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:29:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:29:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:29:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106534675] [2024-10-11 19:29:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106534675] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:29:14,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:29:14,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:29:14,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7809122] [2024-10-11 19:29:14,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:29:14,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:29:14,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:29:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:29:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:29:14,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 106 [2024-10-11 19:29:14,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-10-11 19:29:14,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:29:14,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 106 [2024-10-11 19:29:14,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:29:23,686 INFO L124 PetriNetUnfolderBase]: 102347/156705 cut-off events. [2024-10-11 19:29:23,686 INFO L125 PetriNetUnfolderBase]: For 2058/2058 co-relation queries the response was YES. [2024-10-11 19:29:23,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300023 conditions, 156705 events. 102347/156705 cut-off events. For 2058/2058 co-relation queries the response was YES. Maximal size of possible extension queue 3341. Compared 1302318 event pairs, 46139 based on Foata normal form. 0/108759 useless extension candidates. Maximal degree in co-relation 300017. Up to 84446 conditions per place. [2024-10-11 19:29:24,888 INFO L140 encePairwiseOnDemand]: 91/106 looper letters, 106 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2024-10-11 19:29:24,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 149 transitions, 554 flow [2024-10-11 19:29:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:29:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:29:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2024-10-11 19:29:24,890 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.710691823899371 [2024-10-11 19:29:24,890 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 210 flow. Second operand 3 states and 226 transitions. [2024-10-11 19:29:24,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 149 transitions, 554 flow [2024-10-11 19:29:24,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 149 transitions, 554 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:29:24,893 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 290 flow [2024-10-11 19:29:24,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2024-10-11 19:29:24,894 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2024-10-11 19:29:24,894 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 290 flow [2024-10-11 19:29:24,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-10-11 19:29:24,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:24,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 19:29:24,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:29:24,895 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-11 19:29:24,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:24,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1787855479, now seen corresponding path program 1 times [2024-10-11 19:29:24,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:24,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432563710] [2024-10-11 19:29:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:29:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:29:24,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:29:24,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432563710] [2024-10-11 19:29:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432563710] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:29:24,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:29:24,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:29:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731449935] [2024-10-11 19:29:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:29:24,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:29:24,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:29:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:29:24,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:29:24,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 106 [2024-10-11 19:29:24,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2024-10-11 19:29:24,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:29:24,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 106 [2024-10-11 19:29:24,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:29:32,054 INFO L124 PetriNetUnfolderBase]: 71516/116622 cut-off events. [2024-10-11 19:29:32,054 INFO L125 PetriNetUnfolderBase]: For 19283/19283 co-relation queries the response was YES. [2024-10-11 19:29:32,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243626 conditions, 116622 events. 71516/116622 cut-off events. For 19283/19283 co-relation queries the response was YES. Maximal size of possible extension queue 2423. Compared 1006255 event pairs, 18951 based on Foata normal form. 10245/97398 useless extension candidates. Maximal degree in co-relation 243618. Up to 85264 conditions per place. [2024-10-11 19:29:32,884 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 94 selfloop transitions, 3 changer transitions 0/137 dead transitions. [2024-10-11 19:29:32,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 137 transitions, 562 flow [2024-10-11 19:29:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:29:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:29:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2024-10-11 19:29:32,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-11 19:29:32,886 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 290 flow. Second operand 3 states and 212 transitions. [2024-10-11 19:29:32,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 137 transitions, 562 flow [2024-10-11 19:29:33,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 137 transitions, 544 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:29:33,097 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 266 flow [2024-10-11 19:29:33,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-10-11 19:29:33,097 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -7 predicate places. [2024-10-11 19:29:33,097 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 266 flow [2024-10-11 19:29:33,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2024-10-11 19:29:33,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:29:33,098 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:29:33,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 19:29:33,098 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-11 19:29:33,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:29:33,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1314082893, now seen corresponding path program 1 times [2024-10-11 19:29:33,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:29:33,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295437227] [2024-10-11 19:29:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:29:33,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:29:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:29:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:29:33,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:29:33,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295437227] [2024-10-11 19:29:33,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295437227] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:29:33,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:29:33,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:29:33,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011537616] [2024-10-11 19:29:33,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:29:33,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:29:33,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:29:33,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:29:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:29:33,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 106 [2024-10-11 19:29:33,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2024-10-11 19:29:33,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:29:33,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 106 [2024-10-11 19:29:33,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand