./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.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_05-lockfuns_racefree.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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:17:51,704 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:17:51,792 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:17:51,806 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:17:51,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:17:51,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:17:51,850 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:17:51,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:17:51,851 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:17:51,855 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:17:51,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:17:51,856 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:17:51,856 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:17:51,857 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:17:51,857 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:17:51,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:17:51,857 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:17:51,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:17:51,858 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:17:51,858 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:17:51,858 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:17:51,865 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:17:51,866 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:17:51,866 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:17:51,866 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:17:51,866 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:17:51,866 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:17:51,867 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:17:51,867 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:17:51,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:17:51,867 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:17:51,867 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:17:51,867 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:17:51,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:17:51,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:17:51,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:17:51,868 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:17:51,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:17:51,869 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:17:51,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:17:51,869 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:17:51,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:17:51,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2024-11-12 16:17:52,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:17:52,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:17:52,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:17:52,324 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:17:52,324 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:17:52,325 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2024-11-12 16:17:53,686 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:17:53,907 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:17:53,908 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2024-11-12 16:17:53,924 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b6495a83/1101575843ea41edbfeb316f6e35db16/FLAG43a0a0e1f [2024-11-12 16:17:54,253 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b6495a83/1101575843ea41edbfeb316f6e35db16 [2024-11-12 16:17:54,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:17:54,256 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:17:54,257 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:17:54,258 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:17:54,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:17:54,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc52681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54, skipping insertion in model container [2024-11-12 16:17:54,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,291 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:17:54,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:17:54,538 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:17:54,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:17:54,617 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:17:54,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54 WrapperNode [2024-11-12 16:17:54,618 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:17:54,619 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:17:54,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:17:54,621 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:17:54,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,639 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,661 INFO L138 Inliner]: procedures = 173, calls = 38, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2024-11-12 16:17:54,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:17:54,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:17:54,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:17:54,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:17:54,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,716 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 16:17:54,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,737 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:17:54,744 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:17:54,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:17:54,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:17:54,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (1/1) ... [2024-11-12 16:17:54,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:17:54,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:17:54,795 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 16:17:54,802 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 16:17:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:17:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:17:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:17:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-12 16:17:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:17:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:17:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:17:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-12 16:17:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 16:17:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:17:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-12 16:17:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-12 16:17:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-12 16:17:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 16:17:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:17:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:17:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:17:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-12 16:17:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 16:17:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:17:54,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:17:54,841 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 16:17:55,038 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:17:55,040 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:17:55,200 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:17:55,200 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:17:55,399 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:17:55,399 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-12 16:17:55,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:17:55 BoogieIcfgContainer [2024-11-12 16:17:55,399 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:17:55,406 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:17:55,406 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:17:55,409 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:17:55,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:17:54" (1/3) ... [2024-11-12 16:17:55,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542df379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:17:55, skipping insertion in model container [2024-11-12 16:17:55,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:17:54" (2/3) ... [2024-11-12 16:17:55,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542df379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:17:55, skipping insertion in model container [2024-11-12 16:17:55,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:17:55" (3/3) ... [2024-11-12 16:17:55,414 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2024-11-12 16:17:55,443 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:17:55,443 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-12 16:17:55,444 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:17:55,500 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-12 16:17:55,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 62 transitions, 131 flow [2024-11-12 16:17:55,564 INFO L124 PetriNetUnfolderBase]: 15/94 cut-off events. [2024-11-12 16:17:55,564 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:17:55,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 15/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 348 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2024-11-12 16:17:55,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 62 transitions, 131 flow [2024-11-12 16:17:55,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 62 transitions, 131 flow [2024-11-12 16:17:55,581 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:17:55,588 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;@76b35879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:17:55,589 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-12 16:17:55,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:17:55,596 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:17:55,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:17:55,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:55,597 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:17:55,597 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:55,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:55,604 INFO L85 PathProgramCache]: Analyzing trace with hash 342913, now seen corresponding path program 1 times [2024-11-12 16:17:55,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:55,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285345791] [2024-11-12 16:17:55,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:55,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:55,860 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 16:17:55,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:55,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285345791] [2024-11-12 16:17:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285345791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:55,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:55,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:17:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102902373] [2024-11-12 16:17:55,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:55,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:17:55,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:17:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:17:55,986 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-12 16:17:55,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 62 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 16:17:55,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:55,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-12 16:17:55,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:56,162 INFO L124 PetriNetUnfolderBase]: 177/564 cut-off events. [2024-11-12 16:17:56,163 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:17:56,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 564 events. 177/564 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2864 event pairs, 154 based on Foata normal form. 105/649 useless extension candidates. Maximal degree in co-relation 912. Up to 350 conditions per place. [2024-11-12 16:17:56,168 INFO L140 encePairwiseOnDemand]: 48/62 looper letters, 39 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2024-11-12 16:17:56,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 211 flow [2024-11-12 16:17:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:17:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:17:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-12 16:17:56,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2024-11-12 16:17:56,187 INFO L175 Difference]: Start difference. First operand has 54 places, 62 transitions, 131 flow. Second operand 3 states and 114 transitions. [2024-11-12 16:17:56,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 211 flow [2024-11-12 16:17:56,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:17:56,191 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 107 flow [2024-11-12 16:17:56,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-11-12 16:17:56,195 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-11-12 16:17:56,195 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 107 flow [2024-11-12 16:17:56,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 16:17:56,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:56,196 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:17:56,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:17:56,196 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:56,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:56,197 INFO L85 PathProgramCache]: Analyzing trace with hash 342914, now seen corresponding path program 1 times [2024-11-12 16:17:56,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:56,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154101483] [2024-11-12 16:17:56,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:56,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:56,287 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 16:17:56,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:56,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154101483] [2024-11-12 16:17:56,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154101483] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:56,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:56,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:17:56,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846046218] [2024-11-12 16:17:56,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:56,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:17:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:56,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:17:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:17:56,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 62 [2024-11-12 16:17:56,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 16:17:56,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:56,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 62 [2024-11-12 16:17:56,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:56,386 INFO L124 PetriNetUnfolderBase]: 154/512 cut-off events. [2024-11-12 16:17:56,386 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2024-11-12 16:17:56,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 512 events. 154/512 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2581 event pairs, 104 based on Foata normal form. 1/483 useless extension candidates. Maximal degree in co-relation 842. Up to 326 conditions per place. [2024-11-12 16:17:56,390 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 39 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-11-12 16:17:56,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 213 flow [2024-11-12 16:17:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:17:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:17:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-12 16:17:56,392 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-11-12 16:17:56,392 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 107 flow. Second operand 3 states and 106 transitions. [2024-11-12 16:17:56,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 213 flow [2024-11-12 16:17:56,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:17:56,395 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 113 flow [2024-11-12 16:17:56,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-11-12 16:17:56,396 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-11-12 16:17:56,396 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 113 flow [2024-11-12 16:17:56,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 16:17:56,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:56,396 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:17:56,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:17:56,397 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:56,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:56,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1129669692, now seen corresponding path program 1 times [2024-11-12 16:17:56,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:56,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980619321] [2024-11-12 16:17:56,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:56,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:56,518 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 16:17:56,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:56,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980619321] [2024-11-12 16:17:56,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980619321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:56,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:56,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:17:56,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382383707] [2024-11-12 16:17:56,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:56,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:17:56,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:56,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:17:56,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:17:56,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 62 [2024-11-12 16:17:56,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 16:17:56,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:56,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 62 [2024-11-12 16:17:56,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:56,603 INFO L124 PetriNetUnfolderBase]: 33/103 cut-off events. [2024-11-12 16:17:56,604 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-12 16:17:56,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 103 events. 33/103 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 24/124 useless extension candidates. Maximal degree in co-relation 191. Up to 69 conditions per place. [2024-11-12 16:17:56,605 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 27 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-12 16:17:56,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 142 flow [2024-11-12 16:17:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:17:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:17:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-11-12 16:17:56,606 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4475806451612903 [2024-11-12 16:17:56,606 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 113 flow. Second operand 4 states and 111 transitions. [2024-11-12 16:17:56,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 142 flow [2024-11-12 16:17:56,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:17:56,607 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 56 flow [2024-11-12 16:17:56,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-11-12 16:17:56,608 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -24 predicate places. [2024-11-12 16:17:56,608 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 56 flow [2024-11-12 16:17:56,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 16:17:56,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:56,609 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-12 16:17:56,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:17:56,609 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:56,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash -660021772, now seen corresponding path program 1 times [2024-11-12 16:17:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:56,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807839016] [2024-11-12 16:17:56,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:56,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:17:56,623 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:17:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:17:56,646 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:17:56,646 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:17:56,647 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-12 16:17:56,648 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-12 16:17:56,649 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-12 16:17:56,649 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-12 16:17:56,649 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-12 16:17:56,649 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-12 16:17:56,649 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-12 16:17:56,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:17:56,650 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-12 16:17:56,652 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:17:56,652 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-12 16:17:56,670 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:17:56,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 88 transitions, 192 flow [2024-11-12 16:17:56,682 INFO L124 PetriNetUnfolderBase]: 27/164 cut-off events. [2024-11-12 16:17:56,682 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 16:17:56,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 164 events. 27/164 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 696 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2024-11-12 16:17:56,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 88 transitions, 192 flow [2024-11-12 16:17:56,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 88 transitions, 192 flow [2024-11-12 16:17:56,685 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:17:56,686 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;@76b35879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:17:56,686 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-12 16:17:56,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:17:56,687 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:17:56,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:17:56,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:56,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:17:56,687 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:56,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 430297, now seen corresponding path program 1 times [2024-11-12 16:17:56,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:56,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153425811] [2024-11-12 16:17:56,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:56,753 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 16:17:56,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:56,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153425811] [2024-11-12 16:17:56,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153425811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:56,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:56,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:17:56,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896026587] [2024-11-12 16:17:56,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:56,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:17:56,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:17:56,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:17:56,768 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 88 [2024-11-12 16:17:56,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 16:17:56,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:56,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 88 [2024-11-12 16:17:56,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:57,502 INFO L124 PetriNetUnfolderBase]: 4612/9436 cut-off events. [2024-11-12 16:17:57,503 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-12 16:17:57,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16857 conditions, 9436 events. 4612/9436 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 73262 event pairs, 4026 based on Foata normal form. 2120/11218 useless extension candidates. Maximal degree in co-relation 10528. Up to 6443 conditions per place. [2024-11-12 16:17:57,547 INFO L140 encePairwiseOnDemand]: 68/88 looper letters, 63 selfloop transitions, 2 changer transitions 1/91 dead transitions. [2024-11-12 16:17:57,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 330 flow [2024-11-12 16:17:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:17:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:17:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2024-11-12 16:17:57,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2024-11-12 16:17:57,550 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 192 flow. Second operand 3 states and 171 transitions. [2024-11-12 16:17:57,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 330 flow [2024-11-12 16:17:57,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:17:57,552 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 156 flow [2024-11-12 16:17:57,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=156, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-12 16:17:57,553 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, -1 predicate places. [2024-11-12 16:17:57,553 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 156 flow [2024-11-12 16:17:57,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 16:17:57,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:57,553 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:17:57,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:17:57,554 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:57,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash 430298, now seen corresponding path program 1 times [2024-11-12 16:17:57,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:57,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803769210] [2024-11-12 16:17:57,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:57,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:57,665 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 16:17:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:57,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803769210] [2024-11-12 16:17:57,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803769210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:57,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:57,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:17:57,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105059160] [2024-11-12 16:17:57,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:57,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:17:57,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:57,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:17:57,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:17:57,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2024-11-12 16:17:57,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 16:17:57,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:57,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2024-11-12 16:17:57,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:58,211 INFO L124 PetriNetUnfolderBase]: 4039/8560 cut-off events. [2024-11-12 16:17:58,211 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-11-12 16:17:58,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15231 conditions, 8560 events. 4039/8560 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 68895 event pairs, 1881 based on Foata normal form. 1/8212 useless extension candidates. Maximal degree in co-relation 13963. Up to 6419 conditions per place. [2024-11-12 16:17:58,248 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 53 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-11-12 16:17:58,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 292 flow [2024-11-12 16:17:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:17:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:17:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-11-12 16:17:58,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-11-12 16:17:58,253 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 156 flow. Second operand 3 states and 141 transitions. [2024-11-12 16:17:58,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 292 flow [2024-11-12 16:17:58,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:17:58,264 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 166 flow [2024-11-12 16:17:58,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-11-12 16:17:58,265 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, -1 predicate places. [2024-11-12 16:17:58,266 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 166 flow [2024-11-12 16:17:58,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 16:17:58,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:58,266 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:17:58,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:17:58,266 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:58,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:58,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2029665276, now seen corresponding path program 1 times [2024-11-12 16:17:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:58,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540787946] [2024-11-12 16:17:58,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:58,331 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 16:17:58,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:58,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540787946] [2024-11-12 16:17:58,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540787946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:58,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:58,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:17:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302321417] [2024-11-12 16:17:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:58,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:17:58,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:17:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:17:58,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 88 [2024-11-12 16:17:58,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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 16:17:58,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:58,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 88 [2024-11-12 16:17:58,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:59,031 INFO L124 PetriNetUnfolderBase]: 4028/8544 cut-off events. [2024-11-12 16:17:59,031 INFO L125 PetriNetUnfolderBase]: For 522/532 co-relation queries the response was YES. [2024-11-12 16:17:59,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 8544 events. 4028/8544 cut-off events. For 522/532 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 67729 event pairs, 2251 based on Foata normal form. 12/8320 useless extension candidates. Maximal degree in co-relation 11530. Up to 6074 conditions per place. [2024-11-12 16:17:59,062 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 75 selfloop transitions, 4 changer transitions 0/105 dead transitions. [2024-11-12 16:17:59,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 105 transitions, 398 flow [2024-11-12 16:17:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:17:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:17:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-11-12 16:17:59,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-12 16:17:59,063 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 166 flow. Second operand 4 states and 192 transitions. [2024-11-12 16:17:59,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 105 transitions, 398 flow [2024-11-12 16:17:59,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:17:59,067 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 183 flow [2024-11-12 16:17:59,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2024-11-12 16:17:59,068 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2024-11-12 16:17:59,069 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 183 flow [2024-11-12 16:17:59,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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 16:17:59,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:59,069 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-11-12 16:17:59,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:17:59,069 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:59,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:59,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1199818381, now seen corresponding path program 1 times [2024-11-12 16:17:59,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:59,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221876334] [2024-11-12 16:17:59,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:59,307 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 16:17:59,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:59,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221876334] [2024-11-12 16:17:59,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221876334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:59,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:59,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:17:59,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020099835] [2024-11-12 16:17:59,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:59,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:17:59,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:59,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:17:59,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:17:59,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-12 16:17:59,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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 16:17:59,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:59,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-12 16:17:59,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:59,909 INFO L124 PetriNetUnfolderBase]: 4039/8239 cut-off events. [2024-11-12 16:17:59,910 INFO L125 PetriNetUnfolderBase]: For 887/895 co-relation queries the response was YES. [2024-11-12 16:17:59,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15525 conditions, 8239 events. 4039/8239 cut-off events. For 887/895 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 64037 event pairs, 1407 based on Foata normal form. 144/8189 useless extension candidates. Maximal degree in co-relation 10704. Up to 4850 conditions per place. [2024-11-12 16:17:59,983 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 119 selfloop transitions, 6 changer transitions 0/150 dead transitions. [2024-11-12 16:17:59,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 150 transitions, 589 flow [2024-11-12 16:17:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:17:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:17:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 288 transitions. [2024-11-12 16:17:59,985 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-12 16:17:59,985 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 183 flow. Second operand 6 states and 288 transitions. [2024-11-12 16:17:59,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 150 transitions, 589 flow [2024-11-12 16:17:59,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 150 transitions, 580 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-12 16:17:59,989 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 187 flow [2024-11-12 16:17:59,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-11-12 16:17:59,990 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 5 predicate places. [2024-11-12 16:17:59,990 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 187 flow [2024-11-12 16:17:59,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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 16:17:59,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:59,991 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-12 16:17:59,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:17:59,991 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:17:59,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1460335429, now seen corresponding path program 1 times [2024-11-12 16:17:59,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:59,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697149959] [2024-11-12 16:17:59,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:00,009 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:00,019 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:00,020 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:00,020 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-12 16:18:00,020 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-12 16:18:00,020 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-12 16:18:00,020 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-12 16:18:00,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-12 16:18:00,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-12 16:18:00,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-12 16:18:00,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:18:00,021 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-12 16:18:00,022 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:00,022 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-12 16:18:00,040 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:18:00,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 114 transitions, 255 flow [2024-11-12 16:18:00,058 INFO L124 PetriNetUnfolderBase]: 42/255 cut-off events. [2024-11-12 16:18:00,059 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-12 16:18:00,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 255 events. 42/255 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1151 event pairs, 1 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 175. Up to 12 conditions per place. [2024-11-12 16:18:00,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 114 transitions, 255 flow [2024-11-12 16:18:00,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 114 transitions, 255 flow [2024-11-12 16:18:00,064 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:00,065 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;@76b35879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:00,065 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-12 16:18:00,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:00,066 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:18:00,066 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:00,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:00,066 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:00,067 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:18:00,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:00,067 INFO L85 PathProgramCache]: Analyzing trace with hash 543499, now seen corresponding path program 1 times [2024-11-12 16:18:00,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:00,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675572624] [2024-11-12 16:18:00,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:00,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:00,087 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 16:18:00,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:00,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675572624] [2024-11-12 16:18:00,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675572624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:00,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:00,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305093099] [2024-11-12 16:18:00,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:00,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:00,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 114 [2024-11-12 16:18:00,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 114 transitions, 255 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 16:18:00,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:00,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 114 [2024-11-12 16:18:00,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:09,116 INFO L124 PetriNetUnfolderBase]: 86952/146186 cut-off events. [2024-11-12 16:18:09,116 INFO L125 PetriNetUnfolderBase]: For 1648/1648 co-relation queries the response was YES. [2024-11-12 16:18:09,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268025 conditions, 146186 events. 86952/146186 cut-off events. For 1648/1648 co-relation queries the response was YES. Maximal size of possible extension queue 3077. Compared 1375979 event pairs, 75615 based on Foata normal form. 36536/177717 useless extension candidates. Maximal degree in co-relation 69283. Up to 105165 conditions per place. [2024-11-12 16:18:10,119 INFO L140 encePairwiseOnDemand]: 88/114 looper letters, 87 selfloop transitions, 2 changer transitions 1/122 dead transitions. [2024-11-12 16:18:10,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 451 flow [2024-11-12 16:18:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2024-11-12 16:18:10,121 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-12 16:18:10,121 INFO L175 Difference]: Start difference. First operand has 96 places, 114 transitions, 255 flow. Second operand 3 states and 228 transitions. [2024-11-12 16:18:10,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 451 flow [2024-11-12 16:18:10,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 122 transitions, 451 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:10,124 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 207 flow [2024-11-12 16:18:10,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2024-11-12 16:18:10,126 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -1 predicate places. [2024-11-12 16:18:10,126 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 207 flow [2024-11-12 16:18:10,127 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 16:18:10,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:10,127 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:10,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:18:10,127 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:18:10,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash 543500, now seen corresponding path program 1 times [2024-11-12 16:18:10,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:10,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854070081] [2024-11-12 16:18:10,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:10,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:10,174 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 16:18:10,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:10,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854070081] [2024-11-12 16:18:10,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854070081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:10,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:10,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:10,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665965349] [2024-11-12 16:18:10,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:10,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:10,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:10,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:10,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:10,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 114 [2024-11-12 16:18:10,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 207 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 16:18:10,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:10,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 114 [2024-11-12 16:18:10,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:17,743 INFO L124 PetriNetUnfolderBase]: 75797/130654 cut-off events. [2024-11-12 16:18:17,743 INFO L125 PetriNetUnfolderBase]: For 3082/3082 co-relation queries the response was YES. [2024-11-12 16:18:17,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239133 conditions, 130654 events. 75797/130654 cut-off events. For 3082/3082 co-relation queries the response was YES. Maximal size of possible extension queue 3029. Compared 1255608 event pairs, 49182 based on Foata normal form. 1/126019 useless extension candidates. Maximal degree in co-relation 219122. Up to 105141 conditions per place. [2024-11-12 16:18:18,324 INFO L140 encePairwiseOnDemand]: 110/114 looper letters, 66 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2024-11-12 16:18:18,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 101 transitions, 369 flow [2024-11-12 16:18:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2024-11-12 16:18:18,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5116959064327485 [2024-11-12 16:18:18,325 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 207 flow. Second operand 3 states and 175 transitions. [2024-11-12 16:18:18,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 101 transitions, 369 flow [2024-11-12 16:18:18,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 101 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:18:18,661 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 217 flow [2024-11-12 16:18:18,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2024-11-12 16:18:18,662 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -1 predicate places. [2024-11-12 16:18:18,663 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 217 flow [2024-11-12 16:18:18,663 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 16:18:18,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:18,663 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:18,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:18:18,664 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:18:18,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash -560231778, now seen corresponding path program 1 times [2024-11-12 16:18:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175131427] [2024-11-12 16:18:18,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:18,764 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 16:18:18,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175131427] [2024-11-12 16:18:18,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175131427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:18,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:18,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:18,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110825283] [2024-11-12 16:18:18,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:18,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:18:18,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:18:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:18:18,791 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 114 [2024-11-12 16:18:18,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 217 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 16:18:18,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:18,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 114 [2024-11-12 16:18:18,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:26,436 INFO L124 PetriNetUnfolderBase]: 75686/129181 cut-off events. [2024-11-12 16:18:26,436 INFO L125 PetriNetUnfolderBase]: For 5964/6084 co-relation queries the response was YES. [2024-11-12 16:18:26,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239014 conditions, 129181 events. 75686/129181 cut-off events. For 5964/6084 co-relation queries the response was YES. Maximal size of possible extension queue 3013. Compared 1230785 event pairs, 27887 based on Foata normal form. 1896/128147 useless extension candidates. Maximal degree in co-relation 178971. Up to 79017 conditions per place. [2024-11-12 16:18:27,278 INFO L140 encePairwiseOnDemand]: 109/114 looper letters, 131 selfloop transitions, 5 changer transitions 0/168 dead transitions. [2024-11-12 16:18:27,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 168 transitions, 645 flow [2024-11-12 16:18:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:18:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:18:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 308 transitions. [2024-11-12 16:18:27,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403508771929825 [2024-11-12 16:18:27,280 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 217 flow. Second operand 5 states and 308 transitions. [2024-11-12 16:18:27,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 168 transitions, 645 flow [2024-11-12 16:18:27,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 168 transitions, 643 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:18:27,292 INFO L231 Difference]: Finished difference. Result has 98 places, 89 transitions, 228 flow [2024-11-12 16:18:27,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=98, PETRI_TRANSITIONS=89} [2024-11-12 16:18:27,292 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 2 predicate places. [2024-11-12 16:18:27,293 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 89 transitions, 228 flow [2024-11-12 16:18:27,293 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 16:18:27,293 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:27,293 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-12 16:18:27,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:18:27,293 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:18:27,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2072233549, now seen corresponding path program 1 times [2024-11-12 16:18:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:27,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12796452] [2024-11-12 16:18:27,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:27,306 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:27,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:27,316 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:27,316 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-12 16:18:27,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-12 16:18:27,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-12 16:18:27,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-12 16:18:27,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-12 16:18:27,316 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-12 16:18:27,317 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-12 16:18:27,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:18:27,317 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-12 16:18:27,317 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:27,317 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-12 16:18:27,334 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-12 16:18:27,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 140 transitions, 320 flow [2024-11-12 16:18:27,352 INFO L124 PetriNetUnfolderBase]: 65/390 cut-off events. [2024-11-12 16:18:27,352 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-12 16:18:27,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 390 events. 65/390 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1910 event pairs, 6 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 279. Up to 32 conditions per place. [2024-11-12 16:18:27,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 140 transitions, 320 flow [2024-11-12 16:18:27,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 140 transitions, 320 flow [2024-11-12 16:18:27,356 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:27,356 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;@76b35879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:27,357 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-12 16:18:27,357 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:27,357 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:18:27,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:27,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:27,358 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:27,358 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-12 16:18:27,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash 682519, now seen corresponding path program 1 times [2024-11-12 16:18:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240382438] [2024-11-12 16:18:27,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:27,375 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 16:18:27,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:27,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240382438] [2024-11-12 16:18:27,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240382438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:27,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:27,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:27,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275341117] [2024-11-12 16:18:27,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:27,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:27,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:27,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:27,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 140 [2024-11-12 16:18:27,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 140 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:27,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:27,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 140 [2024-11-12 16:18:27,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand