./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b4399e58ed3ca9c75e2a61372e91a4308548a0e79a3eb4428d85990bd71242f7 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:19:08,596 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:19:08,676 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:19:08,682 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:19:08,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:19:08,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:19:08,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:19:08,723 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:19:08,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:19:08,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:19:08,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:19:08,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:19:08,727 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:19:08,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:19:08,728 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:19:08,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:19:08,728 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:19:08,729 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:19:08,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:19:08,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:19:08,729 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:19:08,730 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:19:08,730 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:19:08,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:19:08,731 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:19:08,731 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:19:08,731 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:19:08,731 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:19:08,732 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:19:08,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:19:08,732 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:19:08,733 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:19:08,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:19:08,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:19:08,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:19:08,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:19:08,735 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:19:08,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:19:08,735 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:19:08,736 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:19:08,736 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:19:08,736 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:19:08,737 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4399e58ed3ca9c75e2a61372e91a4308548a0e79a3eb4428d85990bd71242f7 [2024-11-12 16:19:08,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:19:09,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:19:09,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:19:09,016 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:19:09,017 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:19:09,018 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2024-11-12 16:19:10,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:19:10,723 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:19:10,724 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2024-11-12 16:19:10,739 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/455cd49f4/ca1b2b89093a40c6b8698bffcbb482b3/FLAG65312c58e [2024-11-12 16:19:11,061 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/455cd49f4/ca1b2b89093a40c6b8698bffcbb482b3 [2024-11-12 16:19:11,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:19:11,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:19:11,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:19:11,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:19:11,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:19:11,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8b0a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11, skipping insertion in model container [2024-11-12 16:19:11,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,119 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:19:11,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:19:11,545 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:19:11,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:19:11,654 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:19:11,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11 WrapperNode [2024-11-12 16:19:11,655 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:19:11,656 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:19:11,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:19:11,657 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:19:11,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,717 INFO L138 Inliner]: procedures = 171, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 108 [2024-11-12 16:19:11,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:19:11,721 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:19:11,721 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:19:11,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:19:11,736 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,741 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,777 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-11-12 16:19:11,777 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,792 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,801 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:19:11,802 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:19:11,802 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:19:11,802 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:19:11,803 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (1/1) ... [2024-11-12 16:19:11,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:19:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:19:11,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 16:19:11,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 16:19:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:19:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:19:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:19:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-12 16:19:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:19:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:19:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:19:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-12 16:19:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 16:19:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:19:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-12 16:19:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-12 16:19:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-12 16:19:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 16:19:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:19:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:19:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:19:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-12 16:19:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 16:19:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:19:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:19:11,885 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:19:12,003 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:19:12,005 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:19:12,325 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:19:12,326 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:19:12,501 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:19:12,506 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-12 16:19:12,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:19:12 BoogieIcfgContainer [2024-11-12 16:19:12,507 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:19:12,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:19:12,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:19:12,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:19:12,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:19:11" (1/3) ... [2024-11-12 16:19:12,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284d65a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:19:12, skipping insertion in model container [2024-11-12 16:19:12,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:19:11" (2/3) ... [2024-11-12 16:19:12,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284d65a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:19:12, skipping insertion in model container [2024-11-12 16:19:12,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:19:12" (3/3) ... [2024-11-12 16:19:12,520 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2024-11-12 16:19:12,539 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:19:12,539 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-12 16:19:12,539 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:19:12,604 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-12 16:19:12,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 89 transitions, 185 flow [2024-11-12 16:19:12,721 INFO L124 PetriNetUnfolderBase]: 28/138 cut-off events. [2024-11-12 16:19:12,722 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:19:12,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 138 events. 28/138 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 522 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2024-11-12 16:19:12,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 89 transitions, 185 flow [2024-11-12 16:19:12,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 89 transitions, 185 flow [2024-11-12 16:19:12,747 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:19:12,757 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;@46e7cbe3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:19:12,758 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-12 16:19:12,762 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:19:12,763 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:19:12,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:19:12,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:12,764 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:19:12,765 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:12,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash 429099, now seen corresponding path program 1 times [2024-11-12 16:19:12,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:12,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020788546] [2024-11-12 16:19:12,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:12,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:13,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:13,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020788546] [2024-11-12 16:19:13,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020788546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:13,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:13,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:13,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160873077] [2024-11-12 16:19:13,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:13,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:13,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:13,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-11-12 16:19:13,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2024-11-12 16:19:13,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:13,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-11-12 16:19:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:13,484 INFO L124 PetriNetUnfolderBase]: 296/914 cut-off events. [2024-11-12 16:19:13,485 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:19:13,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 914 events. 296/914 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5610 event pairs, 247 based on Foata normal form. 188/1065 useless extension candidates. Maximal degree in co-relation 1466. Up to 567 conditions per place. [2024-11-12 16:19:13,497 INFO L140 encePairwiseOnDemand]: 69/89 looper letters, 48 selfloop transitions, 2 changer transitions 1/83 dead transitions. [2024-11-12 16:19:13,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 275 flow [2024-11-12 16:19:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:19:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:19:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2024-11-12 16:19:13,515 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6404494382022472 [2024-11-12 16:19:13,518 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 185 flow. Second operand 3 states and 171 transitions. [2024-11-12 16:19:13,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 275 flow [2024-11-12 16:19:13,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:19:13,526 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 149 flow [2024-11-12 16:19:13,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-12 16:19:13,535 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-12 16:19:13,535 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 149 flow [2024-11-12 16:19:13,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2024-11-12 16:19:13,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:13,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:19:13,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:19:13,537 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:13,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:13,538 INFO L85 PathProgramCache]: Analyzing trace with hash 429100, now seen corresponding path program 1 times [2024-11-12 16:19:13,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:13,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986054337] [2024-11-12 16:19:13,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:13,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:13,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:13,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986054337] [2024-11-12 16:19:13,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986054337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:13,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:13,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:13,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597635372] [2024-11-12 16:19:13,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:13,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:13,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:13,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:13,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2024-11-12 16:19:13,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-12 16:19:13,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:13,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2024-11-12 16:19:13,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:13,988 INFO L124 PetriNetUnfolderBase]: 267/857 cut-off events. [2024-11-12 16:19:13,988 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:19:13,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1426 conditions, 857 events. 267/857 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 5034 event pairs, 216 based on Foata normal form. 1/809 useless extension candidates. Maximal degree in co-relation 1398. Up to 531 conditions per place. [2024-11-12 16:19:13,999 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 48 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-11-12 16:19:14,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 277 flow [2024-11-12 16:19:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:19:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:19:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-12 16:19:14,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-12 16:19:14,005 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 149 flow. Second operand 3 states and 157 transitions. [2024-11-12 16:19:14,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 277 flow [2024-11-12 16:19:14,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 273 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:19:14,012 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 155 flow [2024-11-12 16:19:14,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-12 16:19:14,014 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-12 16:19:14,014 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 155 flow [2024-11-12 16:19:14,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2024-11-12 16:19:14,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:14,015 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:19:14,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:19:14,016 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:14,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1158965909, now seen corresponding path program 1 times [2024-11-12 16:19:14,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:14,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150630582] [2024-11-12 16:19:14,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150630582] [2024-11-12 16:19:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150630582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:14,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:19:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645579204] [2024-11-12 16:19:14,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:14,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:19:14,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:14,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:19:14,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:19:14,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-12 16:19:14,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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) [2024-11-12 16:19:14,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:14,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-12 16:19:14,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:14,376 INFO L124 PetriNetUnfolderBase]: 43/154 cut-off events. [2024-11-12 16:19:14,377 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-12 16:19:14,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 154 events. 43/154 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 451 event pairs, 24 based on Foata normal form. 28/178 useless extension candidates. Maximal degree in co-relation 270. Up to 81 conditions per place. [2024-11-12 16:19:14,378 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 31 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-11-12 16:19:14,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 174 flow [2024-11-12 16:19:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:19:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:19:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2024-11-12 16:19:14,380 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4803370786516854 [2024-11-12 16:19:14,380 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 155 flow. Second operand 4 states and 171 transitions. [2024-11-12 16:19:14,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 174 flow [2024-11-12 16:19:14,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:19:14,381 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 76 flow [2024-11-12 16:19:14,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-11-12 16:19:14,383 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -35 predicate places. [2024-11-12 16:19:14,383 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 76 flow [2024-11-12 16:19:14,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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) [2024-11-12 16:19:14,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:14,383 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-12 16:19:14,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:19:14,384 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:14,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:14,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1568205237, now seen corresponding path program 1 times [2024-11-12 16:19:14,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:14,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504486928] [2024-11-12 16:19:14,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:14,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:19:14,408 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:19:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:19:14,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:19:14,447 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:19:14,449 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-12 16:19:14,451 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-12 16:19:14,451 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-12 16:19:14,451 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-12 16:19:14,452 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-12 16:19:14,452 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-12 16:19:14,452 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-12 16:19:14,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:19:14,453 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-12 16:19:14,457 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:19:14,457 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-12 16:19:14,483 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:19:14,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 125 transitions, 266 flow [2024-11-12 16:19:14,514 INFO L124 PetriNetUnfolderBase]: 47/235 cut-off events. [2024-11-12 16:19:14,514 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2024-11-12 16:19:14,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 235 events. 47/235 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1067 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2024-11-12 16:19:14,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 125 transitions, 266 flow [2024-11-12 16:19:14,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 125 transitions, 266 flow [2024-11-12 16:19:14,525 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:19:14,526 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;@46e7cbe3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:19:14,526 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-12 16:19:14,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:19:14,528 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:19:14,528 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:19:14,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:14,528 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:19:14,528 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:14,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash 553224, now seen corresponding path program 1 times [2024-11-12 16:19:14,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:14,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777796157] [2024-11-12 16:19:14,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:14,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777796157] [2024-11-12 16:19:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777796157] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:14,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:14,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957359240] [2024-11-12 16:19:14,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:14,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:14,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:14,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 125 [2024-11-12 16:19:14,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 125 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2024-11-12 16:19:14,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:14,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 125 [2024-11-12 16:19:14,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:16,560 INFO L124 PetriNetUnfolderBase]: 8837/17940 cut-off events. [2024-11-12 16:19:16,561 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-11-12 16:19:16,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31571 conditions, 17940 events. 8837/17940 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 163069 event pairs, 7397 based on Foata normal form. 3937/21255 useless extension candidates. Maximal degree in co-relation 12854. Up to 12263 conditions per place. [2024-11-12 16:19:16,697 INFO L140 encePairwiseOnDemand]: 99/125 looper letters, 76 selfloop transitions, 2 changer transitions 1/126 dead transitions. [2024-11-12 16:19:16,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 426 flow [2024-11-12 16:19:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:19:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:19:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2024-11-12 16:19:16,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6826666666666666 [2024-11-12 16:19:16,702 INFO L175 Difference]: Start difference. First operand has 104 places, 125 transitions, 266 flow. Second operand 3 states and 256 transitions. [2024-11-12 16:19:16,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 426 flow [2024-11-12 16:19:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 126 transitions, 426 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:19:16,709 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 218 flow [2024-11-12 16:19:16,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2024-11-12 16:19:16,711 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -1 predicate places. [2024-11-12 16:19:16,712 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 218 flow [2024-11-12 16:19:16,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2024-11-12 16:19:16,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:16,712 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:19:16,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:19:16,713 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:16,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 553225, now seen corresponding path program 1 times [2024-11-12 16:19:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984576963] [2024-11-12 16:19:16,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:16,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984576963] [2024-11-12 16:19:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984576963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:16,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:16,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:16,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714199292] [2024-11-12 16:19:16,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:16,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:16,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:16,809 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 125 [2024-11-12 16:19:16,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-11-12 16:19:16,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:16,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 125 [2024-11-12 16:19:16,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:18,550 INFO L124 PetriNetUnfolderBase]: 7696/16274 cut-off events. [2024-11-12 16:19:18,550 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2024-11-12 16:19:18,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28521 conditions, 16274 events. 7696/16274 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 150761 event pairs, 3497 based on Foata normal form. 1/15509 useless extension candidates. Maximal degree in co-relation 26803. Up to 11927 conditions per place. [2024-11-12 16:19:18,661 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 64 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-11-12 16:19:18,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 114 transitions, 380 flow [2024-11-12 16:19:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:19:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:19:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-11-12 16:19:18,663 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5813333333333334 [2024-11-12 16:19:18,664 INFO L175 Difference]: Start difference. First operand has 103 places, 99 transitions, 218 flow. Second operand 3 states and 218 transitions. [2024-11-12 16:19:18,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 114 transitions, 380 flow [2024-11-12 16:19:18,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 114 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:19:18,690 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 228 flow [2024-11-12 16:19:18,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2024-11-12 16:19:18,692 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -1 predicate places. [2024-11-12 16:19:18,693 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 228 flow [2024-11-12 16:19:18,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2024-11-12 16:19:18,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:18,694 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:19:18,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:19:18,694 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:18,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:18,695 INFO L85 PathProgramCache]: Analyzing trace with hash -168246064, now seen corresponding path program 1 times [2024-11-12 16:19:18,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:18,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444546304] [2024-11-12 16:19:18,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:18,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:18,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:18,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444546304] [2024-11-12 16:19:18,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444546304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:18,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:18,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:19:18,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202574008] [2024-11-12 16:19:18,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:18,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:19:18,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:19:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:19:18,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 125 [2024-11-12 16:19:18,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 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) [2024-11-12 16:19:18,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:18,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 125 [2024-11-12 16:19:18,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:20,369 INFO L124 PetriNetUnfolderBase]: 7683/16569 cut-off events. [2024-11-12 16:19:20,370 INFO L125 PetriNetUnfolderBase]: For 692/692 co-relation queries the response was YES. [2024-11-12 16:19:20,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29083 conditions, 16569 events. 7683/16569 cut-off events. For 692/692 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 153716 event pairs, 3060 based on Foata normal form. 14/16003 useless extension candidates. Maximal degree in co-relation 2695. Up to 11356 conditions per place. [2024-11-12 16:19:20,486 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 90 selfloop transitions, 4 changer transitions 0/142 dead transitions. [2024-11-12 16:19:20,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 502 flow [2024-11-12 16:19:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:19:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:19:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 295 transitions. [2024-11-12 16:19:20,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-12 16:19:20,488 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 228 flow. Second operand 4 states and 295 transitions. [2024-11-12 16:19:20,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 502 flow [2024-11-12 16:19:20,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 142 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:19:20,494 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 245 flow [2024-11-12 16:19:20,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2024-11-12 16:19:20,495 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2024-11-12 16:19:20,496 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 245 flow [2024-11-12 16:19:20,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 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) [2024-11-12 16:19:20,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:20,497 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-11-12 16:19:20,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:19:20,497 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:20,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 276582774, now seen corresponding path program 1 times [2024-11-12 16:19:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:20,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698180463] [2024-11-12 16:19:20,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:20,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698180463] [2024-11-12 16:19:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698180463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:20,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:20,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:19:20,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445408258] [2024-11-12 16:19:20,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:20,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:19:20,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:20,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:19:20,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:19:20,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 125 [2024-11-12 16:19:20,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2024-11-12 16:19:20,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:20,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 125 [2024-11-12 16:19:20,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:22,457 INFO L124 PetriNetUnfolderBase]: 7375/15480 cut-off events. [2024-11-12 16:19:22,458 INFO L125 PetriNetUnfolderBase]: For 1226/1226 co-relation queries the response was YES. [2024-11-12 16:19:22,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28025 conditions, 15480 events. 7375/15480 cut-off events. For 1226/1226 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 142562 event pairs, 180 based on Foata normal form. 196/15349 useless extension candidates. Maximal degree in co-relation 24444. Up to 9794 conditions per place. [2024-11-12 16:19:22,578 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 114 selfloop transitions, 5 changer transitions 0/167 dead transitions. [2024-11-12 16:19:22,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 167 transitions, 611 flow [2024-11-12 16:19:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:19:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:19:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 370 transitions. [2024-11-12 16:19:22,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.592 [2024-11-12 16:19:22,581 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 245 flow. Second operand 5 states and 370 transitions. [2024-11-12 16:19:22,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 167 transitions, 611 flow [2024-11-12 16:19:22,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 602 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-12 16:19:22,586 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 240 flow [2024-11-12 16:19:22,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-11-12 16:19:22,588 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2024-11-12 16:19:22,588 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 240 flow [2024-11-12 16:19:22,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2024-11-12 16:19:22,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:22,589 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-12 16:19:22,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:19:22,589 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:22,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash -15868013, now seen corresponding path program 1 times [2024-11-12 16:19:22,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:22,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585051103] [2024-11-12 16:19:22,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:22,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:19:22,605 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:19:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:19:22,622 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:19:22,623 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:19:22,624 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-12 16:19:22,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-12 16:19:22,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-12 16:19:22,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-11-12 16:19:22,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-12 16:19:22,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-11-12 16:19:22,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-12 16:19:22,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:19:22,627 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-12 16:19:22,628 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:19:22,629 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-12 16:19:22,664 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:19:22,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 161 transitions, 349 flow [2024-11-12 16:19:22,711 INFO L124 PetriNetUnfolderBase]: 69/353 cut-off events. [2024-11-12 16:19:22,712 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2024-11-12 16:19:22,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 353 events. 69/353 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1760 event pairs, 1 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 246. Up to 12 conditions per place. [2024-11-12 16:19:22,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 161 transitions, 349 flow [2024-11-12 16:19:22,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 161 transitions, 349 flow [2024-11-12 16:19:22,721 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:19:22,723 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;@46e7cbe3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:19:22,724 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-12 16:19:22,726 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:19:22,726 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:19:22,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:19:22,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:22,726 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:19:22,727 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:22,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 713097, now seen corresponding path program 1 times [2024-11-12 16:19:22,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:22,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589069202] [2024-11-12 16:19:22,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:22,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589069202] [2024-11-12 16:19:22,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589069202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:22,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:22,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:22,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304093216] [2024-11-12 16:19:22,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:22,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:22,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:22,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:22,783 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 161 [2024-11-12 16:19:22,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 161 transitions, 349 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2024-11-12 16:19:22,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:22,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 161 [2024-11-12 16:19:22,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:49,750 INFO L124 PetriNetUnfolderBase]: 192014/323708 cut-off events. [2024-11-12 16:19:49,750 INFO L125 PetriNetUnfolderBase]: For 4143/4143 co-relation queries the response was YES. [2024-11-12 16:19:50,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584459 conditions, 323708 events. 192014/323708 cut-off events. For 4143/4143 co-relation queries the response was YES. Maximal size of possible extension queue 6562. Compared 3460132 event pairs, 160330 based on Foata normal form. 73869/387505 useless extension candidates. Maximal degree in co-relation 100250. Up to 233593 conditions per place. [2024-11-12 16:19:52,354 INFO L140 encePairwiseOnDemand]: 129/161 looper letters, 104 selfloop transitions, 2 changer transitions 1/169 dead transitions. [2024-11-12 16:19:52,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 169 transitions, 579 flow [2024-11-12 16:19:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:19:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:19:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2024-11-12 16:19:52,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7060041407867494 [2024-11-12 16:19:52,357 INFO L175 Difference]: Start difference. First operand has 134 places, 161 transitions, 349 flow. Second operand 3 states and 341 transitions. [2024-11-12 16:19:52,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 169 transitions, 579 flow [2024-11-12 16:19:52,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 169 transitions, 579 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:19:52,362 INFO L231 Difference]: Finished difference. Result has 133 places, 129 transitions, 289 flow [2024-11-12 16:19:52,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=133, PETRI_TRANSITIONS=129} [2024-11-12 16:19:52,363 INFO L279 CegarLoopForPetriNet]: 134 programPoint places, -1 predicate places. [2024-11-12 16:19:52,363 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 129 transitions, 289 flow [2024-11-12 16:19:52,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2024-11-12 16:19:52,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:52,364 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:19:52,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:19:52,364 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-11-12 16:19:52,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:52,365 INFO L85 PathProgramCache]: Analyzing trace with hash 713098, now seen corresponding path program 1 times [2024-11-12 16:19:52,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:52,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344227627] [2024-11-12 16:19:52,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:52,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344227627] [2024-11-12 16:19:52,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344227627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:52,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:52,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:52,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223760434] [2024-11-12 16:19:52,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:52,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:52,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:52,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:52,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 161 [2024-11-12 16:19:52,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 129 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2024-11-12 16:19:52,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:52,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 161 [2024-11-12 16:19:52,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand