./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.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/goblint-regression/28-race_reach_74-tricky_address1_racefree.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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:48:01,994 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:48:02,072 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:48:02,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:48:02,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:48:02,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:48:02,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:48:02,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:48:02,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:48:02,106 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:48:02,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:48:02,107 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:48:02,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:48:02,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:48:02,107 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:48:02,108 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:48:02,111 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:48:02,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:48:02,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:48:02,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:48:02,112 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:48:02,113 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:48:02,113 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:48:02,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:48:02,113 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:48:02,113 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:48:02,113 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:48:02,114 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:48:02,114 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:48:02,114 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:48:02,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:48:02,114 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:48:02,114 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:48:02,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:48:02,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:48:02,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:48:02,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:48:02,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:48:02,115 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:48:02,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:48:02,115 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:48:02,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:48:02,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2024-10-11 19:48:02,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:48:02,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:48:02,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:48:02,394 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:48:02,395 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:48:02,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2024-10-11 19:48:03,699 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:48:03,916 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:48:03,917 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2024-10-11 19:48:03,936 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/847454b4d/558b67604dce42ab8bd80c1e21afa340/FLAG34051c3b0 [2024-10-11 19:48:03,949 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/847454b4d/558b67604dce42ab8bd80c1e21afa340 [2024-10-11 19:48:03,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:48:03,953 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:48:03,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:48:03,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:48:03,958 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:48:03,959 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:48:03" (1/1) ... [2024-10-11 19:48:03,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772ecbe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:03, skipping insertion in model container [2024-10-11 19:48:03,961 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:48:03" (1/1) ... [2024-10-11 19:48:03,999 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:48:04,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:48:04,420 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:48:04,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:48:04,519 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:48:04,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04 WrapperNode [2024-10-11 19:48:04,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:48:04,521 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:48:04,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:48:04,522 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:48:04,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,581 INFO L138 Inliner]: procedures = 271, calls = 50, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 217 [2024-10-11 19:48:04,582 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:48:04,583 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:48:04,583 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:48:04,583 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:48:04,593 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,596 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,609 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 11, 5, 2]. 55 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 6 writes are split as follows [0, 5, 0, 1]. [2024-10-11 19:48:04,610 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,610 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,619 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,623 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,624 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,627 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:48:04,631 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:48:04,631 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:48:04,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:48:04,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (1/1) ... [2024-10-11 19:48:04,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:48:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:04,667 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 19:48:04,669 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 19:48:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 19:48:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 19:48:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:48:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:48:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:48:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-11 19:48:04,707 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-11 19:48:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:48:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:48:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:48:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 19:48:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:48:04,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:48:04,709 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 19:48:04,825 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:48:04,827 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:48:05,172 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:48:05,173 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:48:05,325 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:48:05,325 INFO L314 CfgBuilder]: Removed 23 assume(true) statements. [2024-10-11 19:48:05,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:48:05 BoogieIcfgContainer [2024-10-11 19:48:05,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:48:05,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:48:05,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:48:05,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:48:05,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:48:03" (1/3) ... [2024-10-11 19:48:05,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba5aa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:48:05, skipping insertion in model container [2024-10-11 19:48:05,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:48:04" (2/3) ... [2024-10-11 19:48:05,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba5aa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:48:05, skipping insertion in model container [2024-10-11 19:48:05,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:48:05" (3/3) ... [2024-10-11 19:48:05,356 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2024-10-11 19:48:05,373 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:48:05,373 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-10-11 19:48:05,373 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:48:05,426 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-11 19:48:05,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 137 transitions, 281 flow [2024-10-11 19:48:05,516 INFO L124 PetriNetUnfolderBase]: 41/207 cut-off events. [2024-10-11 19:48:05,517 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:48:05,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 207 events. 41/207 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1059 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2024-10-11 19:48:05,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 137 transitions, 281 flow [2024-10-11 19:48:05,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 137 transitions, 281 flow [2024-10-11 19:48:05,538 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:48:05,546 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;@65db23f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:48:05,546 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-10-11 19:48:05,549 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:48:05,550 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-11 19:48:05,550 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:48:05,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:05,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-11 19:48:05,551 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-11 19:48:05,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 18457815, now seen corresponding path program 1 times [2024-10-11 19:48:05,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:05,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771117] [2024-10-11 19:48:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:05,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:05,778 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 19:48:05,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:05,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771117] [2024-10-11 19:48:05,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771117] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:05,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:05,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:05,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067905600] [2024-10-11 19:48:05,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:05,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:05,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:05,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2024-10-11 19:48:05,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 19:48:05,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:05,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2024-10-11 19:48:05,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:06,177 INFO L124 PetriNetUnfolderBase]: 529/1872 cut-off events. [2024-10-11 19:48:06,178 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-10-11 19:48:06,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 1872 events. 529/1872 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14642 event pairs, 480 based on Foata normal form. 378/1985 useless extension candidates. Maximal degree in co-relation 2825. Up to 1049 conditions per place. [2024-10-11 19:48:06,197 INFO L140 encePairwiseOnDemand]: 110/137 looper letters, 49 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-10-11 19:48:06,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 333 flow [2024-10-11 19:48:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2024-10-11 19:48:06,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6301703163017032 [2024-10-11 19:48:06,211 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 281 flow. Second operand 3 states and 259 transitions. [2024-10-11 19:48:06,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 333 flow [2024-10-11 19:48:06,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 112 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:48:06,219 INFO L231 Difference]: Finished difference. Result has 113 places, 112 transitions, 241 flow [2024-10-11 19:48:06,221 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=113, PETRI_TRANSITIONS=112} [2024-10-11 19:48:06,224 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 1 predicate places. [2024-10-11 19:48:06,224 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 112 transitions, 241 flow [2024-10-11 19:48:06,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 19:48:06,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:06,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:48:06,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:48:06,226 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-11 19:48:06,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash 572153341, now seen corresponding path program 1 times [2024-10-11 19:48:06,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:06,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575825184] [2024-10-11 19:48:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:06,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575825184] [2024-10-11 19:48:06,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575825184] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:48:06,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247974251] [2024-10-11 19:48:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:06,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:06,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:48:06,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:48:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:06,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:48:06,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:48:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:06,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:48:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:06,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247974251] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:48:06,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:48:06,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-11 19:48:06,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168993821] [2024-10-11 19:48:06,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:48:06,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:48:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:48:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:48:06,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2024-10-11 19:48:06,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 112 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 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 19:48:06,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:06,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2024-10-11 19:48:06,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:06,807 INFO L124 PetriNetUnfolderBase]: 529/1875 cut-off events. [2024-10-11 19:48:06,807 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-10-11 19:48:06,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 1875 events. 529/1875 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14649 event pairs, 480 based on Foata normal form. 0/1610 useless extension candidates. Maximal degree in co-relation 2931. Up to 1049 conditions per place. [2024-10-11 19:48:06,817 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 49 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-10-11 19:48:06,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 361 flow [2024-10-11 19:48:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:48:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:48:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 423 transitions. [2024-10-11 19:48:06,820 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5145985401459854 [2024-10-11 19:48:06,820 INFO L175 Difference]: Start difference. First operand has 113 places, 112 transitions, 241 flow. Second operand 6 states and 423 transitions. [2024-10-11 19:48:06,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 361 flow [2024-10-11 19:48:06,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 115 transitions, 357 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:48:06,826 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 273 flow [2024-10-11 19:48:06,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2024-10-11 19:48:06,827 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 8 predicate places. [2024-10-11 19:48:06,827 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 273 flow [2024-10-11 19:48:06,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 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 19:48:06,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:06,828 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-11 19:48:06,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:48:07,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:07,029 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-11 19:48:07,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:07,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1743667625, now seen corresponding path program 2 times [2024-10-11 19:48:07,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:07,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787883038] [2024-10-11 19:48:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:07,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 19:48:07,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:07,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787883038] [2024-10-11 19:48:07,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787883038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:07,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:07,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:07,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404869776] [2024-10-11 19:48:07,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:07,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:07,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:07,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:07,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:07,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 137 [2024-10-11 19:48:07,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 19:48:07,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:07,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 137 [2024-10-11 19:48:07,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:07,390 INFO L124 PetriNetUnfolderBase]: 571/1941 cut-off events. [2024-10-11 19:48:07,390 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 19:48:07,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 1941 events. 571/1941 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15084 event pairs, 480 based on Foata normal form. 0/1714 useless extension candidates. Maximal degree in co-relation 3073. Up to 1045 conditions per place. [2024-10-11 19:48:07,400 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 74 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2024-10-11 19:48:07,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 133 transitions, 461 flow [2024-10-11 19:48:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2024-10-11 19:48:07,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5961070559610706 [2024-10-11 19:48:07,404 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 273 flow. Second operand 3 states and 245 transitions. [2024-10-11 19:48:07,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 133 transitions, 461 flow [2024-10-11 19:48:07,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 133 transitions, 447 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 19:48:07,407 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 259 flow [2024-10-11 19:48:07,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2024-10-11 19:48:07,408 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 7 predicate places. [2024-10-11 19:48:07,408 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 259 flow [2024-10-11 19:48:07,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 19:48:07,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:07,408 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-11 19:48:07,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:48:07,409 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-11 19:48:07,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:07,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1743667624, now seen corresponding path program 1 times [2024-10-11 19:48:07,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380791298] [2024-10-11 19:48:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:07,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:07,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:07,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380791298] [2024-10-11 19:48:07,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380791298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:48:07,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420987888] [2024-10-11 19:48:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:07,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:07,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:07,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:48:07,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:48:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:07,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:48:07,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:48:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:07,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:48:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420987888] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:48:07,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:48:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-11 19:48:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786578442] [2024-10-11 19:48:07,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:48:07,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:48:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:48:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:48:07,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2024-10-11 19:48:07,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 259 flow. Second operand has 12 states, 12 states have (on average 62.083333333333336) internal successors, (745), 12 states have internal predecessors, (745), 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 19:48:07,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:07,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2024-10-11 19:48:07,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:07,947 INFO L124 PetriNetUnfolderBase]: 529/1859 cut-off events. [2024-10-11 19:48:07,948 INFO L125 PetriNetUnfolderBase]: For 54/55 co-relation queries the response was YES. [2024-10-11 19:48:07,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2975 conditions, 1859 events. 529/1859 cut-off events. For 54/55 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14379 event pairs, 480 based on Foata normal form. 6/1623 useless extension candidates. Maximal degree in co-relation 2923. Up to 1049 conditions per place. [2024-10-11 19:48:07,956 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 49 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-10-11 19:48:07,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 415 flow [2024-10-11 19:48:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:48:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:48:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 798 transitions. [2024-10-11 19:48:07,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4854014598540146 [2024-10-11 19:48:07,959 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 259 flow. Second operand 12 states and 798 transitions. [2024-10-11 19:48:07,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 415 flow [2024-10-11 19:48:07,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 119 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:48:07,962 INFO L231 Difference]: Finished difference. Result has 134 places, 119 transitions, 339 flow [2024-10-11 19:48:07,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=339, PETRI_PLACES=134, PETRI_TRANSITIONS=119} [2024-10-11 19:48:07,963 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 22 predicate places. [2024-10-11 19:48:07,963 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 119 transitions, 339 flow [2024-10-11 19:48:07,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.083333333333336) internal successors, (745), 12 states have internal predecessors, (745), 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 19:48:07,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:07,964 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-11 19:48:07,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 19:48:08,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:08,166 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-11 19:48:08,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1181187224, now seen corresponding path program 2 times [2024-10-11 19:48:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:08,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819638781] [2024-10-11 19:48:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:08,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:08,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819638781] [2024-10-11 19:48:08,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819638781] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:08,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:08,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:08,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393185027] [2024-10-11 19:48:08,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:08,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:08,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:08,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2024-10-11 19:48:08,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 119 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 19:48:08,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:08,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2024-10-11 19:48:08,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:08,527 INFO L124 PetriNetUnfolderBase]: 548/1885 cut-off events. [2024-10-11 19:48:08,527 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-11 19:48:08,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3027 conditions, 1885 events. 548/1885 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14540 event pairs, 432 based on Foata normal form. 1/1659 useless extension candidates. Maximal degree in co-relation 2951. Up to 1055 conditions per place. [2024-10-11 19:48:08,540 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 80 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2024-10-11 19:48:08,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 140 transitions, 545 flow [2024-10-11 19:48:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-10-11 19:48:08,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6180048661800487 [2024-10-11 19:48:08,542 INFO L175 Difference]: Start difference. First operand has 134 places, 119 transitions, 339 flow. Second operand 3 states and 254 transitions. [2024-10-11 19:48:08,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 140 transitions, 545 flow [2024-10-11 19:48:08,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 140 transitions, 497 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-11 19:48:08,547 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 301 flow [2024-10-11 19:48:08,548 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-10-11 19:48:08,548 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 20 predicate places. [2024-10-11 19:48:08,548 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 301 flow [2024-10-11 19:48:08,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 19:48:08,549 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:08,549 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 19:48:08,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:48:08,549 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-11 19:48:08,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:08,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1746662720, now seen corresponding path program 1 times [2024-10-11 19:48:08,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:08,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422212787] [2024-10-11 19:48:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:08,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:08,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:08,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422212787] [2024-10-11 19:48:08,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422212787] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:48:08,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430317068] [2024-10-11 19:48:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:08,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:08,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:08,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:48:08,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:48:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:08,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:48:08,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:48:08,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:48:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:08,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:48:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:08,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430317068] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:48:08,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:48:08,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-10-11 19:48:08,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711082631] [2024-10-11 19:48:08,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:48:08,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:48:08,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:48:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:48:09,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2024-10-11 19:48:09,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 301 flow. Second operand has 9 states, 9 states have (on average 61.55555555555556) internal successors, (554), 9 states have internal predecessors, (554), 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 19:48:09,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:09,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2024-10-11 19:48:09,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:09,292 INFO L124 PetriNetUnfolderBase]: 62/206 cut-off events. [2024-10-11 19:48:09,292 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-10-11 19:48:09,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 206 events. 62/206 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 836 event pairs, 0 based on Foata normal form. 42/236 useless extension candidates. Maximal degree in co-relation 396. Up to 123 conditions per place. [2024-10-11 19:48:09,294 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 57 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-10-11 19:48:09,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 346 flow [2024-10-11 19:48:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:48:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:48:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-10-11 19:48:09,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5237226277372263 [2024-10-11 19:48:09,295 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 301 flow. Second operand 4 states and 287 transitions. [2024-10-11 19:48:09,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 346 flow [2024-10-11 19:48:09,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 340 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:48:09,299 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 182 flow [2024-10-11 19:48:09,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2024-10-11 19:48:09,301 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, -33 predicate places. [2024-10-11 19:48:09,301 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 182 flow [2024-10-11 19:48:09,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 61.55555555555556) internal successors, (554), 9 states have internal predecessors, (554), 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 19:48:09,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:09,302 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 19:48:09,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:48:09,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:09,503 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-11 19:48:09,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1688031202, now seen corresponding path program 1 times [2024-10-11 19:48:09,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:09,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995258509] [2024-10-11 19:48:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:09,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:48:09,535 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:48:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:48:09,571 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:48:09,571 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:48:09,572 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-10-11 19:48:09,574 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-10-11 19:48:09,574 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-10-11 19:48:09,574 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-10-11 19:48:09,574 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-10-11 19:48:09,574 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-10-11 19:48:09,574 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-10-11 19:48:09,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-10-11 19:48:09,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-10-11 19:48:09,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-10-11 19:48:09,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-10-11 19:48:09,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-10-11 19:48:09,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-10-11 19:48:09,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-10-11 19:48:09,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-10-11 19:48:09,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-10-11 19:48:09,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-10-11 19:48:09,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-10-11 19:48:09,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-10-11 19:48:09,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-10-11 19:48:09,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-10-11 19:48:09,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-10-11 19:48:09,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-10-11 19:48:09,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-10-11 19:48:09,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-10-11 19:48:09,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-10-11 19:48:09,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-10-11 19:48:09,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-10-11 19:48:09,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-10-11 19:48:09,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-10-11 19:48:09,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-10-11 19:48:09,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-10-11 19:48:09,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-10-11 19:48:09,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-10-11 19:48:09,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-10-11 19:48:09,579 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-10-11 19:48:09,579 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-10-11 19:48:09,579 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-10-11 19:48:09,579 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-10-11 19:48:09,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 19:48:09,580 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-11 19:48:09,582 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:48:09,582 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:48:09,615 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:48:09,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 198 transitions, 412 flow [2024-10-11 19:48:09,638 INFO L124 PetriNetUnfolderBase]: 69/350 cut-off events. [2024-10-11 19:48:09,638 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:48:09,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 350 events. 69/350 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2044 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 209. Up to 12 conditions per place. [2024-10-11 19:48:09,641 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 198 transitions, 412 flow [2024-10-11 19:48:09,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 198 transitions, 412 flow [2024-10-11 19:48:09,646 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:48:09,646 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;@65db23f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:48:09,647 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-11 19:48:09,648 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:48:09,648 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-11 19:48:09,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:48:09,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:09,648 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-11 19:48:09,648 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:48:09,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash 24553047, now seen corresponding path program 1 times [2024-10-11 19:48:09,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:09,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756477661] [2024-10-11 19:48:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:09,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:09,666 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 19:48:09,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:09,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756477661] [2024-10-11 19:48:09,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756477661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:09,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:09,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:09,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000520656] [2024-10-11 19:48:09,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:09,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:09,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:09,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:09,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 198 [2024-10-11 19:48:09,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 198 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 19:48:09,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:09,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 198 [2024-10-11 19:48:09,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:13,355 INFO L124 PetriNetUnfolderBase]: 22727/50777 cut-off events. [2024-10-11 19:48:13,355 INFO L125 PetriNetUnfolderBase]: For 159/178 co-relation queries the response was YES. [2024-10-11 19:48:13,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84553 conditions, 50777 events. 22727/50777 cut-off events. For 159/178 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 565910 event pairs, 21160 based on Foata normal form. 12589/57492 useless extension candidates. Maximal degree in co-relation 77545. Up to 33663 conditions per place. [2024-10-11 19:48:13,742 INFO L140 encePairwiseOnDemand]: 159/198 looper letters, 71 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2024-10-11 19:48:13,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 160 transitions, 482 flow [2024-10-11 19:48:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:13,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2024-10-11 19:48:13,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6245791245791246 [2024-10-11 19:48:13,744 INFO L175 Difference]: Start difference. First operand has 161 places, 198 transitions, 412 flow. Second operand 3 states and 371 transitions. [2024-10-11 19:48:13,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 160 transitions, 482 flow [2024-10-11 19:48:13,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 160 transitions, 482 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:48:13,748 INFO L231 Difference]: Finished difference. Result has 161 places, 160 transitions, 346 flow [2024-10-11 19:48:13,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=161, PETRI_TRANSITIONS=160} [2024-10-11 19:48:13,749 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2024-10-11 19:48:13,750 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 160 transitions, 346 flow [2024-10-11 19:48:13,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 19:48:13,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:13,750 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:48:13,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:48:13,750 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:48:13,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash 761105731, now seen corresponding path program 1 times [2024-10-11 19:48:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:13,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354126782] [2024-10-11 19:48:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:13,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:13,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354126782] [2024-10-11 19:48:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354126782] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:48:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211416009] [2024-10-11 19:48:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:13,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:13,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:13,782 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:48:13,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:48:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:13,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:48:13,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:48:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:13,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:48:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:13,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211416009] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:48:13,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:48:13,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-11 19:48:13,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850737718] [2024-10-11 19:48:13,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:48:13,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:48:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:13,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:48:13,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:48:13,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 198 [2024-10-11 19:48:13,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 160 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 88.16666666666667) internal successors, (529), 6 states have internal predecessors, (529), 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 19:48:13,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:13,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 198 [2024-10-11 19:48:13,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:17,090 INFO L124 PetriNetUnfolderBase]: 22727/50780 cut-off events. [2024-10-11 19:48:17,091 INFO L125 PetriNetUnfolderBase]: For 159/178 co-relation queries the response was YES. [2024-10-11 19:48:17,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84569 conditions, 50780 events. 22727/50780 cut-off events. For 159/178 co-relation queries the response was YES. Maximal size of possible extension queue 1525. Compared 565906 event pairs, 21160 based on Foata normal form. 0/44906 useless extension candidates. Maximal degree in co-relation 84556. Up to 33663 conditions per place. [2024-10-11 19:48:17,388 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 71 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2024-10-11 19:48:17,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 163 transitions, 510 flow [2024-10-11 19:48:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:48:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:48:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 601 transitions. [2024-10-11 19:48:17,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5058922558922558 [2024-10-11 19:48:17,391 INFO L175 Difference]: Start difference. First operand has 161 places, 160 transitions, 346 flow. Second operand 6 states and 601 transitions. [2024-10-11 19:48:17,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 163 transitions, 510 flow [2024-10-11 19:48:17,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 163 transitions, 506 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:48:17,396 INFO L231 Difference]: Finished difference. Result has 168 places, 163 transitions, 378 flow [2024-10-11 19:48:17,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=168, PETRI_TRANSITIONS=163} [2024-10-11 19:48:17,399 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 7 predicate places. [2024-10-11 19:48:17,399 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 378 flow [2024-10-11 19:48:17,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.16666666666667) internal successors, (529), 6 states have internal predecessors, (529), 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 19:48:17,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:17,400 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-11 19:48:17,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 19:48:17,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-11 19:48:17,604 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:48:17,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 930021719, now seen corresponding path program 2 times [2024-10-11 19:48:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:17,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019290011] [2024-10-11 19:48:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:17,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 19:48:17,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:17,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019290011] [2024-10-11 19:48:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019290011] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:17,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:17,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536637750] [2024-10-11 19:48:17,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:17,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:17,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:17,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 198 [2024-10-11 19:48:17,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 19:48:17,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:17,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 198 [2024-10-11 19:48:17,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:21,279 INFO L124 PetriNetUnfolderBase]: 24518/53615 cut-off events. [2024-10-11 19:48:21,280 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2024-10-11 19:48:21,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90143 conditions, 53615 events. 24518/53615 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 1579. Compared 593259 event pairs, 21140 based on Foata normal form. 0/47970 useless extension candidates. Maximal degree in co-relation 90108. Up to 33606 conditions per place. [2024-10-11 19:48:21,660 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 116 selfloop transitions, 2 changer transitions 0/201 dead transitions. [2024-10-11 19:48:21,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 201 transitions, 690 flow [2024-10-11 19:48:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2024-10-11 19:48:21,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144781144781145 [2024-10-11 19:48:21,664 INFO L175 Difference]: Start difference. First operand has 168 places, 163 transitions, 378 flow. Second operand 3 states and 365 transitions. [2024-10-11 19:48:21,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 201 transitions, 690 flow [2024-10-11 19:48:21,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 201 transitions, 676 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 19:48:21,670 INFO L231 Difference]: Finished difference. Result has 167 places, 161 transitions, 364 flow [2024-10-11 19:48:21,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=167, PETRI_TRANSITIONS=161} [2024-10-11 19:48:21,671 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 6 predicate places. [2024-10-11 19:48:21,672 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 161 transitions, 364 flow [2024-10-11 19:48:21,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 19:48:21,673 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:21,673 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-11 19:48:21,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:48:21,673 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:48:21,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash 930021720, now seen corresponding path program 1 times [2024-10-11 19:48:21,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125507642] [2024-10-11 19:48:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:21,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125507642] [2024-10-11 19:48:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125507642] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:48:21,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739960583] [2024-10-11 19:48:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:21,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:21,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:21,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:48:21,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:48:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:22,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:48:22,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:48:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:22,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:48:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:22,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739960583] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:48:22,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:48:22,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 19:48:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117146278] [2024-10-11 19:48:22,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:48:22,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:48:22,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:48:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 19:48:22,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 198 [2024-10-11 19:48:22,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 161 transitions, 364 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 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 19:48:22,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:22,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 198 [2024-10-11 19:48:22,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:25,721 INFO L124 PetriNetUnfolderBase]: 22727/50543 cut-off events. [2024-10-11 19:48:25,722 INFO L125 PetriNetUnfolderBase]: For 452/471 co-relation queries the response was YES. [2024-10-11 19:48:25,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84842 conditions, 50543 events. 22727/50543 cut-off events. For 452/471 co-relation queries the response was YES. Maximal size of possible extension queue 1511. Compared 560494 event pairs, 21160 based on Foata normal form. 6/44919 useless extension candidates. Maximal degree in co-relation 84789. Up to 33663 conditions per place. [2024-10-11 19:48:26,028 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 71 selfloop transitions, 11 changer transitions 0/167 dead transitions. [2024-10-11 19:48:26,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 167 transitions, 564 flow [2024-10-11 19:48:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:48:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:48:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1132 transitions. [2024-10-11 19:48:26,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4764309764309764 [2024-10-11 19:48:26,031 INFO L175 Difference]: Start difference. First operand has 167 places, 161 transitions, 364 flow. Second operand 12 states and 1132 transitions. [2024-10-11 19:48:26,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 167 transitions, 564 flow [2024-10-11 19:48:26,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 167 transitions, 560 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:48:26,054 INFO L231 Difference]: Finished difference. Result has 182 places, 167 transitions, 444 flow [2024-10-11 19:48:26,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=444, PETRI_PLACES=182, PETRI_TRANSITIONS=167} [2024-10-11 19:48:26,055 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-10-11 19:48:26,055 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 167 transitions, 444 flow [2024-10-11 19:48:26,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 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 19:48:26,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:26,056 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-11 19:48:26,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 19:48:26,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 19:48:26,256 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:48:26,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:26,257 INFO L85 PathProgramCache]: Analyzing trace with hash -894879272, now seen corresponding path program 2 times [2024-10-11 19:48:26,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:26,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220180979] [2024-10-11 19:48:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:26,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:26,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:26,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220180979] [2024-10-11 19:48:26,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220180979] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:26,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:26,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175734887] [2024-10-11 19:48:26,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:26,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:26,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 198 [2024-10-11 19:48:26,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 167 transitions, 444 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 19:48:26,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:26,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 198 [2024-10-11 19:48:26,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:30,292 INFO L124 PetriNetUnfolderBase]: 23628/53079 cut-off events. [2024-10-11 19:48:30,292 INFO L125 PetriNetUnfolderBase]: For 233/259 co-relation queries the response was YES. [2024-10-11 19:48:30,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88227 conditions, 53079 events. 23628/53079 cut-off events. For 233/259 co-relation queries the response was YES. Maximal size of possible extension queue 1561. Compared 596413 event pairs, 20858 based on Foata normal form. 1/47127 useless extension candidates. Maximal degree in co-relation 88150. Up to 34954 conditions per place. [2024-10-11 19:48:30,883 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 103 selfloop transitions, 2 changer transitions 0/189 dead transitions. [2024-10-11 19:48:30,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 189 transitions, 698 flow [2024-10-11 19:48:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2024-10-11 19:48:30,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5976430976430976 [2024-10-11 19:48:30,888 INFO L175 Difference]: Start difference. First operand has 182 places, 167 transitions, 444 flow. Second operand 3 states and 355 transitions. [2024-10-11 19:48:30,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 189 transitions, 698 flow [2024-10-11 19:48:30,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 189 transitions, 650 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-11 19:48:30,894 INFO L231 Difference]: Finished difference. Result has 180 places, 168 transitions, 410 flow [2024-10-11 19:48:30,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=410, PETRI_PLACES=180, PETRI_TRANSITIONS=168} [2024-10-11 19:48:30,895 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 19 predicate places. [2024-10-11 19:48:30,895 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 168 transitions, 410 flow [2024-10-11 19:48:30,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 19:48:30,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:30,896 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 19:48:30,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 19:48:30,896 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:48:30,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:30,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2130508645, now seen corresponding path program 1 times [2024-10-11 19:48:30,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:30,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038896459] [2024-10-11 19:48:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:30,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:31,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:31,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038896459] [2024-10-11 19:48:31,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038896459] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:48:31,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509036519] [2024-10-11 19:48:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:31,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:31,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:31,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:48:31,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 19:48:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:31,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:48:31,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:48:31,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:48:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:31,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:48:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509036519] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:48:31,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:48:31,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 19:48:31,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443253323] [2024-10-11 19:48:31,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:48:31,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:48:31,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:48:31,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:48:31,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2024-10-11 19:48:31,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 168 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 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 19:48:31,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:31,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2024-10-11 19:48:31,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:35,151 INFO L124 PetriNetUnfolderBase]: 22571/49376 cut-off events. [2024-10-11 19:48:35,152 INFO L125 PetriNetUnfolderBase]: For 1101/1122 co-relation queries the response was YES. [2024-10-11 19:48:35,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84399 conditions, 49376 events. 22571/49376 cut-off events. For 1101/1122 co-relation queries the response was YES. Maximal size of possible extension queue 1548. Compared 549749 event pairs, 2671 based on Foata normal form. 483/45213 useless extension candidates. Maximal degree in co-relation 84345. Up to 29099 conditions per place. [2024-10-11 19:48:35,464 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 184 selfloop transitions, 4 changer transitions 0/271 dead transitions. [2024-10-11 19:48:35,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 271 transitions, 990 flow [2024-10-11 19:48:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:48:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:48:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2024-10-11 19:48:35,466 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6121212121212121 [2024-10-11 19:48:35,466 INFO L175 Difference]: Start difference. First operand has 180 places, 168 transitions, 410 flow. Second operand 5 states and 606 transitions. [2024-10-11 19:48:35,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 271 transitions, 990 flow [2024-10-11 19:48:35,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 271 transitions, 988 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:48:35,471 INFO L231 Difference]: Finished difference. Result has 182 places, 167 transitions, 412 flow [2024-10-11 19:48:35,471 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=182, PETRI_TRANSITIONS=167} [2024-10-11 19:48:35,471 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-10-11 19:48:35,471 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 167 transitions, 412 flow [2024-10-11 19:48:35,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 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 19:48:35,472 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:35,472 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:48:35,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 19:48:35,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 19:48:35,673 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:48:35,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:35,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2117810536, now seen corresponding path program 1 times [2024-10-11 19:48:35,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:35,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542517141] [2024-10-11 19:48:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:35,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:35,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:35,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542517141] [2024-10-11 19:48:35,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542517141] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:35,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:35,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:48:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086893469] [2024-10-11 19:48:35,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:35,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:48:35,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:35,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:48:35,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:48:35,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 198 [2024-10-11 19:48:35,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 167 transitions, 412 flow. Second operand has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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 19:48:35,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:35,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 198 [2024-10-11 19:48:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:39,845 INFO L124 PetriNetUnfolderBase]: 24514/49987 cut-off events. [2024-10-11 19:48:39,846 INFO L125 PetriNetUnfolderBase]: For 2913/2913 co-relation queries the response was YES. [2024-10-11 19:48:40,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88862 conditions, 49987 events. 24514/49987 cut-off events. For 2913/2913 co-relation queries the response was YES. Maximal size of possible extension queue 1449. Compared 527993 event pairs, 609 based on Foata normal form. 0/47930 useless extension candidates. Maximal degree in co-relation 88808. Up to 31250 conditions per place. [2024-10-11 19:48:40,194 INFO L140 encePairwiseOnDemand]: 180/198 looper letters, 202 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2024-10-11 19:48:40,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 283 transitions, 1086 flow [2024-10-11 19:48:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:48:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:48:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 592 transitions. [2024-10-11 19:48:40,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.597979797979798 [2024-10-11 19:48:40,197 INFO L175 Difference]: Start difference. First operand has 182 places, 167 transitions, 412 flow. Second operand 5 states and 592 transitions. [2024-10-11 19:48:40,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 283 transitions, 1086 flow [2024-10-11 19:48:40,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 283 transitions, 1069 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-11 19:48:40,202 INFO L231 Difference]: Finished difference. Result has 182 places, 169 transitions, 470 flow [2024-10-11 19:48:40,202 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=470, PETRI_PLACES=182, PETRI_TRANSITIONS=169} [2024-10-11 19:48:40,203 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-10-11 19:48:40,203 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 169 transitions, 470 flow [2024-10-11 19:48:40,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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 19:48:40,203 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:40,203 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 19:48:40,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 19:48:40,203 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:48:40,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1339507982, now seen corresponding path program 1 times [2024-10-11 19:48:40,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:40,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071464075] [2024-10-11 19:48:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:40,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:48:40,220 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:48:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:48:40,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:48:40,240 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:48:40,240 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-10-11 19:48:40,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-10-11 19:48:40,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-10-11 19:48:40,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-10-11 19:48:40,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-10-11 19:48:40,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-10-11 19:48:40,241 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-10-11 19:48:40,242 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-10-11 19:48:40,242 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-10-11 19:48:40,242 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-10-11 19:48:40,242 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-10-11 19:48:40,242 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-10-11 19:48:40,242 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-10-11 19:48:40,242 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-10-11 19:48:40,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-10-11 19:48:40,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-10-11 19:48:40,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-10-11 19:48:40,246 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-10-11 19:48:40,246 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-10-11 19:48:40,246 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-10-11 19:48:40,246 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-10-11 19:48:40,246 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-10-11 19:48:40,246 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-10-11 19:48:40,246 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-10-11 19:48:40,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 19:48:40,246 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-10-11 19:48:40,248 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:48:40,248 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 19:48:40,284 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 19:48:40,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 259 transitions, 545 flow [2024-10-11 19:48:40,319 INFO L124 PetriNetUnfolderBase]: 100/514 cut-off events. [2024-10-11 19:48:40,319 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-11 19:48:40,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 514 events. 100/514 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3156 event pairs, 1 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 359. Up to 16 conditions per place. [2024-10-11 19:48:40,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 259 transitions, 545 flow [2024-10-11 19:48:40,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 259 transitions, 545 flow [2024-10-11 19:48:40,333 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:48:40,334 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;@65db23f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:48:40,334 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-10-11 19:48:40,335 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:48:40,336 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-11 19:48:40,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:48:40,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:40,337 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-11 19:48:40,337 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-10-11 19:48:40,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 32526103, now seen corresponding path program 1 times [2024-10-11 19:48:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:40,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349483640] [2024-10-11 19:48:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:40,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:40,354 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 19:48:40,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:40,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349483640] [2024-10-11 19:48:40,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349483640] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:40,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:40,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:40,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616296953] [2024-10-11 19:48:40,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:40,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:40,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:40,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2024-10-11 19:48:40,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 259 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 19:48:40,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:40,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2024-10-11 19:48:40,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand