./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:18:28,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:18:28,507 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:18:28,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:18:28,514 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:18:28,535 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:18:28,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:18:28,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:18:28,536 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:18:28,537 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:18:28,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:18:28,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:18:28,538 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:18:28,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:18:28,538 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:18:28,539 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:18:28,539 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:18:28,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:18:28,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:18:28,540 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:18:28,544 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:18:28,545 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:18:28,545 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:18:28,546 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:18:28,546 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:18:28,546 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:18:28,546 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:18:28,546 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:18:28,546 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:18:28,547 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:18:28,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:18:28,547 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:18:28,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:18:28,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:18:28,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:18:28,548 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:18:28,548 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:18:28,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:18:28,548 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:18:28,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:18:28,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:18:28,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:18:28,551 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2024-11-12 16:18:28,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:18:28,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:18:28,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:18:28,768 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:18:28,768 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:18:28,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-11-12 16:18:30,112 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:18:30,320 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:18:30,320 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-11-12 16:18:30,339 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fed59b5c/c0a3d558797448ab9516a45ef9b9c4e3/FLAG76004a6f3 [2024-11-12 16:18:30,351 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fed59b5c/c0a3d558797448ab9516a45ef9b9c4e3 [2024-11-12 16:18:30,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:18:30,355 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:18:30,356 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:18:30,356 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:18:30,361 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:18:30,362 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62595e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30, skipping insertion in model container [2024-11-12 16:18:30,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,405 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:18:30,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:18:30,785 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:18:30,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:18:30,857 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:18:30,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30 WrapperNode [2024-11-12 16:18:30,858 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:18:30,859 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:18:30,859 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:18:30,859 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:18:30,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,909 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-11-12 16:18:30,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:18:30,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:18:30,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:18:30,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:18:30,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,924 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,947 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 6, 5]. 33 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-11-12 16:18:30,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:18:30,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:18:30,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:18:30,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:18:30,967 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (1/1) ... [2024-11-12 16:18:30,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:18:30,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:18:31,001 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 16:18:31,003 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 16:18:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:18:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:18:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:18:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-12 16:18:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:18:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-12 16:18:31,042 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 16:18:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:18:31,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:18:31,044 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 16:18:31,153 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:18:31,155 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:18:31,349 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:18:31,350 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:18:31,457 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:18:31,458 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-12 16:18:31,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:18:31 BoogieIcfgContainer [2024-11-12 16:18:31,458 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:18:31,460 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:18:31,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:18:31,462 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:18:31,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:18:30" (1/3) ... [2024-11-12 16:18:31,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a117c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:18:31, skipping insertion in model container [2024-11-12 16:18:31,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:18:30" (2/3) ... [2024-11-12 16:18:31,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a117c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:18:31, skipping insertion in model container [2024-11-12 16:18:31,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:18:31" (3/3) ... [2024-11-12 16:18:31,465 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2024-11-12 16:18:31,478 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:18:31,479 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-12 16:18:31,479 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:18:31,522 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:18:31,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 64 transitions, 132 flow [2024-11-12 16:18:31,590 INFO L124 PetriNetUnfolderBase]: 14/89 cut-off events. [2024-11-12 16:18:31,591 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:31,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 89 events. 14/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 305 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2024-11-12 16:18:31,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 64 transitions, 132 flow [2024-11-12 16:18:31,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 64 transitions, 132 flow [2024-11-12 16:18:31,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:31,620 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;@69d4cbfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:31,620 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-12 16:18:31,624 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:31,624 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-12 16:18:31,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:31,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:31,625 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:31,625 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:18:31,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash 315801, now seen corresponding path program 1 times [2024-11-12 16:18:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:31,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83929948] [2024-11-12 16:18:31,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:31,929 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 16:18:31,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:31,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83929948] [2024-11-12 16:18:31,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83929948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:31,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:31,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630752771] [2024-11-12 16:18:31,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:31,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:31,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:31,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:32,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-11-12 16:18:32,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 64 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 16:18:32,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:32,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-11-12 16:18:32,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:32,148 INFO L124 PetriNetUnfolderBase]: 121/445 cut-off events. [2024-11-12 16:18:32,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:32,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 445 events. 121/445 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2449 event pairs, 100 based on Foata normal form. 83/466 useless extension candidates. Maximal degree in co-relation 701. Up to 254 conditions per place. [2024-11-12 16:18:32,153 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 35 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-11-12 16:18:32,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 210 flow [2024-11-12 16:18:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2024-11-12 16:18:32,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7395833333333334 [2024-11-12 16:18:32,170 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 132 flow. Second operand 3 states and 142 transitions. [2024-11-12 16:18:32,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 210 flow [2024-11-12 16:18:32,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:32,178 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 120 flow [2024-11-12 16:18:32,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-11-12 16:18:32,187 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-11-12 16:18:32,187 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 120 flow [2024-11-12 16:18:32,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 16:18:32,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:32,188 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:32,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:18:32,189 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:18:32,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -397124900, now seen corresponding path program 1 times [2024-11-12 16:18:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335558500] [2024-11-12 16:18:32,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:32,355 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 16:18:32,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:32,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335558500] [2024-11-12 16:18:32,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335558500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:32,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:32,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:18:32,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477139980] [2024-11-12 16:18:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:32,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:18:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:32,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:18:32,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:18:32,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-11-12 16:18:32,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 16:18:32,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:32,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-11-12 16:18:32,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:32,437 INFO L124 PetriNetUnfolderBase]: 33/141 cut-off events. [2024-11-12 16:18:32,437 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-12 16:18:32,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 141 events. 33/141 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 440 event pairs, 20 based on Foata normal form. 24/151 useless extension candidates. Maximal degree in co-relation 237. Up to 69 conditions per place. [2024-11-12 16:18:32,438 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 27 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-11-12 16:18:32,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 164 flow [2024-11-12 16:18:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:18:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:18:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-12 16:18:32,441 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.57421875 [2024-11-12 16:18:32,441 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 120 flow. Second operand 4 states and 147 transitions. [2024-11-12 16:18:32,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 164 flow [2024-11-12 16:18:32,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:18:32,442 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 78 flow [2024-11-12 16:18:32,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-11-12 16:18:32,443 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -16 predicate places. [2024-11-12 16:18:32,443 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 78 flow [2024-11-12 16:18:32,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 16:18:32,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:32,444 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-12 16:18:32,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:18:32,444 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:18:32,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:32,444 INFO L85 PathProgramCache]: Analyzing trace with hash 574030373, now seen corresponding path program 1 times [2024-11-12 16:18:32,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:32,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253965701] [2024-11-12 16:18:32,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:32,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:32,462 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:32,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:32,499 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:32,501 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-11-12 16:18:32,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (20 of 22 remaining) [2024-11-12 16:18:32,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (19 of 22 remaining) [2024-11-12 16:18:32,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2024-11-12 16:18:32,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2024-11-12 16:18:32,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (16 of 22 remaining) [2024-11-12 16:18:32,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2024-11-12 16:18:32,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2024-11-12 16:18:32,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2024-11-12 16:18:32,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2024-11-12 16:18:32,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2024-11-12 16:18:32,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2024-11-12 16:18:32,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2024-11-12 16:18:32,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2024-11-12 16:18:32,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:18:32,506 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-12 16:18:32,508 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:32,508 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-12 16:18:32,529 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:18:32,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 100 transitions, 210 flow [2024-11-12 16:18:32,541 INFO L124 PetriNetUnfolderBase]: 24/151 cut-off events. [2024-11-12 16:18:32,542 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:18:32,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 151 events. 24/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 640 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2024-11-12 16:18:32,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 100 transitions, 210 flow [2024-11-12 16:18:32,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 100 transitions, 210 flow [2024-11-12 16:18:32,545 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:32,546 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69d4cbfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:32,546 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-12 16:18:32,547 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:32,547 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-12 16:18:32,547 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:32,547 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:32,547 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:32,547 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:32,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 415101, now seen corresponding path program 1 times [2024-11-12 16:18:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:32,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963371661] [2024-11-12 16:18:32,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:32,615 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 16:18:32,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:32,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963371661] [2024-11-12 16:18:32,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963371661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:32,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:32,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:32,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425734897] [2024-11-12 16:18:32,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:32,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:32,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:32,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 100 [2024-11-12 16:18:32,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:32,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:32,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 100 [2024-11-12 16:18:32,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:33,335 INFO L124 PetriNetUnfolderBase]: 3157/7121 cut-off events. [2024-11-12 16:18:33,335 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-12 16:18:33,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12195 conditions, 7121 events. 3157/7121 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 60398 event pairs, 3146 based on Foata normal form. 1632/7958 useless extension candidates. Maximal degree in co-relation 8438. Up to 5018 conditions per place. [2024-11-12 16:18:33,375 INFO L140 encePairwiseOnDemand]: 80/100 looper letters, 48 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2024-11-12 16:18:33,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 97 transitions, 304 flow [2024-11-12 16:18:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2024-11-12 16:18:33,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-11-12 16:18:33,378 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 210 flow. Second operand 3 states and 215 transitions. [2024-11-12 16:18:33,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 97 transitions, 304 flow [2024-11-12 16:18:33,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:33,380 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 190 flow [2024-11-12 16:18:33,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2024-11-12 16:18:33,382 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 2 predicate places. [2024-11-12 16:18:33,383 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 190 flow [2024-11-12 16:18:33,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:33,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:33,383 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:33,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:18:33,383 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:33,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1118318269, now seen corresponding path program 1 times [2024-11-12 16:18:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:33,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139462510] [2024-11-12 16:18:33,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:33,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:33,443 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 16:18:33,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:33,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139462510] [2024-11-12 16:18:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139462510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:33,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:33,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:18:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019453958] [2024-11-12 16:18:33,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:33,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:18:33,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:18:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:18:33,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 100 [2024-11-12 16:18:33,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 16:18:33,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:33,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 100 [2024-11-12 16:18:33,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:34,053 INFO L124 PetriNetUnfolderBase]: 3069/6667 cut-off events. [2024-11-12 16:18:34,054 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2024-11-12 16:18:34,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12016 conditions, 6667 events. 3069/6667 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 56431 event pairs, 154 based on Foata normal form. 24/6352 useless extension candidates. Maximal degree in co-relation 11912. Up to 4489 conditions per place. [2024-11-12 16:18:34,094 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 71 selfloop transitions, 3 changer transitions 0/121 dead transitions. [2024-11-12 16:18:34,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 412 flow [2024-11-12 16:18:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:18:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:18:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 264 transitions. [2024-11-12 16:18:34,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-12 16:18:34,098 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 190 flow. Second operand 4 states and 264 transitions. [2024-11-12 16:18:34,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 412 flow [2024-11-12 16:18:34,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 121 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:18:34,104 INFO L231 Difference]: Finished difference. Result has 94 places, 84 transitions, 200 flow [2024-11-12 16:18:34,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=94, PETRI_TRANSITIONS=84} [2024-11-12 16:18:34,105 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 5 predicate places. [2024-11-12 16:18:34,105 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 84 transitions, 200 flow [2024-11-12 16:18:34,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 16:18:34,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:34,106 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-11-12 16:18:34,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:18:34,106 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:34,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1111219292, now seen corresponding path program 1 times [2024-11-12 16:18:34,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:34,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036012885] [2024-11-12 16:18:34,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:34,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:34,211 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 16:18:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036012885] [2024-11-12 16:18:34,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036012885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:34,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:34,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:34,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444654062] [2024-11-12 16:18:34,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:34,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:18:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:18:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:18:34,217 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 100 [2024-11-12 16:18:34,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 84 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 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 16:18:34,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:34,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 100 [2024-11-12 16:18:34,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:34,457 INFO L124 PetriNetUnfolderBase]: 957/1963 cut-off events. [2024-11-12 16:18:34,457 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2024-11-12 16:18:34,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4050 conditions, 1963 events. 957/1963 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 12558 event pairs, 154 based on Foata normal form. 288/2131 useless extension candidates. Maximal degree in co-relation 2653. Up to 1224 conditions per place. [2024-11-12 16:18:34,469 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 63 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2024-11-12 16:18:34,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 362 flow [2024-11-12 16:18:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:18:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:18:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 303 transitions. [2024-11-12 16:18:34,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.606 [2024-11-12 16:18:34,471 INFO L175 Difference]: Start difference. First operand has 94 places, 84 transitions, 200 flow. Second operand 5 states and 303 transitions. [2024-11-12 16:18:34,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 362 flow [2024-11-12 16:18:34,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 103 transitions, 352 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-12 16:18:34,477 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 152 flow [2024-11-12 16:18:34,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-12 16:18:34,477 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, -13 predicate places. [2024-11-12 16:18:34,477 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 152 flow [2024-11-12 16:18:34,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 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 16:18:34,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:34,478 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:18:34,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:18:34,478 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:34,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1693868129, now seen corresponding path program 1 times [2024-11-12 16:18:34,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:34,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397121750] [2024-11-12 16:18:34,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:34,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:34,539 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 16:18:34,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:34,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397121750] [2024-11-12 16:18:34,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397121750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:34,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:34,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:34,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569218866] [2024-11-12 16:18:34,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:34,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:34,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:34,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 100 [2024-11-12 16:18:34,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 16:18:34,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:34,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 100 [2024-11-12 16:18:34,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:34,760 INFO L124 PetriNetUnfolderBase]: 957/2130 cut-off events. [2024-11-12 16:18:34,761 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2024-11-12 16:18:34,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3927 conditions, 2130 events. 957/2130 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 13735 event pairs, 957 based on Foata normal form. 0/2083 useless extension candidates. Maximal degree in co-relation 2695. Up to 1584 conditions per place. [2024-11-12 16:18:34,771 INFO L140 encePairwiseOnDemand]: 91/100 looper letters, 28 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2024-11-12 16:18:34,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 194 flow [2024-11-12 16:18:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-12 16:18:34,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-12 16:18:34,772 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 152 flow. Second operand 3 states and 156 transitions. [2024-11-12 16:18:34,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 194 flow [2024-11-12 16:18:34,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 189 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:18:34,774 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 133 flow [2024-11-12 16:18:34,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-11-12 16:18:34,774 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, -22 predicate places. [2024-11-12 16:18:34,774 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 133 flow [2024-11-12 16:18:34,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 16:18:34,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:34,775 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:18:34,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:18:34,775 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:34,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:34,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1693868128, now seen corresponding path program 1 times [2024-11-12 16:18:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:34,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890972172] [2024-11-12 16:18:34,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:34,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:34,863 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 16:18:34,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:34,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890972172] [2024-11-12 16:18:34,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890972172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:34,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:34,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87778320] [2024-11-12 16:18:34,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:34,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:34,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:34,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 100 [2024-11-12 16:18:34,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 16:18:34,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:34,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 100 [2024-11-12 16:18:34,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:35,018 INFO L124 PetriNetUnfolderBase]: 957/2016 cut-off events. [2024-11-12 16:18:35,019 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-12 16:18:35,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3801 conditions, 2016 events. 957/2016 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 12288 event pairs, 957 based on Foata normal form. 0/1965 useless extension candidates. Maximal degree in co-relation 3792. Up to 1584 conditions per place. [2024-11-12 16:18:35,028 INFO L140 encePairwiseOnDemand]: 91/100 looper letters, 28 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2024-11-12 16:18:35,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 175 flow [2024-11-12 16:18:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-12 16:18:35,029 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-12 16:18:35,030 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 133 flow. Second operand 3 states and 156 transitions. [2024-11-12 16:18:35,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 175 flow [2024-11-12 16:18:35,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 50 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:18:35,031 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 118 flow [2024-11-12 16:18:35,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-11-12 16:18:35,031 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, -29 predicate places. [2024-11-12 16:18:35,032 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 118 flow [2024-11-12 16:18:35,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 16:18:35,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:35,032 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-12 16:18:35,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:18:35,032 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:18:35,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash 88060204, now seen corresponding path program 1 times [2024-11-12 16:18:35,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:35,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682862197] [2024-11-12 16:18:35,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:35,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:35,046 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:18:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:18:35,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:18:35,059 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:18:35,059 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (29 of 30 remaining) [2024-11-12 16:18:35,059 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (28 of 30 remaining) [2024-11-12 16:18:35,059 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (27 of 30 remaining) [2024-11-12 16:18:35,059 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2024-11-12 16:18:35,059 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 30 remaining) [2024-11-12 16:18:35,059 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (24 of 30 remaining) [2024-11-12 16:18:35,059 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2024-11-12 16:18:35,060 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 30 remaining) [2024-11-12 16:18:35,061 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 30 remaining) [2024-11-12 16:18:35,062 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 30 remaining) [2024-11-12 16:18:35,062 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 30 remaining) [2024-11-12 16:18:35,062 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 30 remaining) [2024-11-12 16:18:35,062 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2024-11-12 16:18:35,062 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 30 remaining) [2024-11-12 16:18:35,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:18:35,062 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-12 16:18:35,063 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:18:35,063 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-12 16:18:35,082 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:18:35,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 136 transitions, 290 flow [2024-11-12 16:18:35,094 INFO L124 PetriNetUnfolderBase]: 34/213 cut-off events. [2024-11-12 16:18:35,094 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-12 16:18:35,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 213 events. 34/213 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 966 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2024-11-12 16:18:35,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 136 transitions, 290 flow [2024-11-12 16:18:35,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 136 transitions, 290 flow [2024-11-12 16:18:35,098 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:18:35,098 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;@69d4cbfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:18:35,098 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-12 16:18:35,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:18:35,099 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-12 16:18:35,099 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:18:35,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:35,099 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:18:35,099 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:18:35,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash 550149, now seen corresponding path program 1 times [2024-11-12 16:18:35,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:35,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579549796] [2024-11-12 16:18:35,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:35,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:35,118 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 16:18:35,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:35,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579549796] [2024-11-12 16:18:35,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579549796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:35,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:35,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:35,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255332188] [2024-11-12 16:18:35,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:35,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:35,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:35,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:35,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 136 [2024-11-12 16:18:35,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 136 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:35,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:35,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 136 [2024-11-12 16:18:35,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:42,431 INFO L124 PetriNetUnfolderBase]: 58597/104897 cut-off events. [2024-11-12 16:18:42,431 INFO L125 PetriNetUnfolderBase]: For 1036/1036 co-relation queries the response was YES. [2024-11-12 16:18:42,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186724 conditions, 104897 events. 58597/104897 cut-off events. For 1036/1036 co-relation queries the response was YES. Maximal size of possible extension queue 2594. Compared 1065394 event pairs, 58586 based on Foata normal form. 26880/122384 useless extension candidates. Maximal degree in co-relation 95464. Up to 81194 conditions per place. [2024-11-12 16:18:43,222 INFO L140 encePairwiseOnDemand]: 110/136 looper letters, 60 selfloop transitions, 2 changer transitions 0/127 dead transitions. [2024-11-12 16:18:43,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 127 transitions, 396 flow [2024-11-12 16:18:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-12 16:18:43,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7034313725490197 [2024-11-12 16:18:43,224 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 290 flow. Second operand 3 states and 287 transitions. [2024-11-12 16:18:43,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 127 transitions, 396 flow [2024-11-12 16:18:43,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 127 transitions, 394 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-12 16:18:43,229 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 256 flow [2024-11-12 16:18:43,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2024-11-12 16:18:43,230 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 2 predicate places. [2024-11-12 16:18:43,232 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 256 flow [2024-11-12 16:18:43,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:18:43,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:43,233 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:18:43,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:18:43,233 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:18:43,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:43,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1289160002, now seen corresponding path program 1 times [2024-11-12 16:18:43,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:43,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835609384] [2024-11-12 16:18:43,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:43,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:43,287 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 16:18:43,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:43,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835609384] [2024-11-12 16:18:43,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835609384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:43,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:18:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117012041] [2024-11-12 16:18:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:43,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:18:43,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:43,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:18:43,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:18:43,290 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 136 [2024-11-12 16:18:43,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 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 16:18:43,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:43,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 136 [2024-11-12 16:18:43,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:50,499 INFO L124 PetriNetUnfolderBase]: 58509/106530 cut-off events. [2024-11-12 16:18:50,500 INFO L125 PetriNetUnfolderBase]: For 6023/6023 co-relation queries the response was YES. [2024-11-12 16:18:50,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193672 conditions, 106530 events. 58509/106530 cut-off events. For 6023/6023 co-relation queries the response was YES. Maximal size of possible extension queue 2715. Compared 1108780 event pairs, 34056 based on Foata normal form. 24/100462 useless extension candidates. Maximal degree in co-relation 16446. Up to 80665 conditions per place. [2024-11-12 16:18:51,439 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 84 selfloop transitions, 3 changer transitions 0/152 dead transitions. [2024-11-12 16:18:51,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 152 transitions, 508 flow [2024-11-12 16:18:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:18:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:18:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2024-11-12 16:18:51,441 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6415441176470589 [2024-11-12 16:18:51,441 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 256 flow. Second operand 4 states and 349 transitions. [2024-11-12 16:18:51,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 152 transitions, 508 flow [2024-11-12 16:18:51,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 152 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:18:51,444 INFO L231 Difference]: Finished difference. Result has 126 places, 115 transitions, 272 flow [2024-11-12 16:18:51,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=126, PETRI_TRANSITIONS=115} [2024-11-12 16:18:51,445 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 5 predicate places. [2024-11-12 16:18:51,446 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 115 transitions, 272 flow [2024-11-12 16:18:51,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 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 16:18:51,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:51,446 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:18:51,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:18:51,446 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:18:51,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1613608022, now seen corresponding path program 1 times [2024-11-12 16:18:51,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:51,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618301278] [2024-11-12 16:18:51,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:51,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:51,492 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 16:18:51,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:51,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618301278] [2024-11-12 16:18:51,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618301278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:51,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:51,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:18:51,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915735098] [2024-11-12 16:18:51,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:51,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:18:51,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:51,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:18:51,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:18:51,523 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2024-11-12 16:18:51,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 115 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 16:18:51,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:51,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2024-11-12 16:18:51,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:18:58,182 INFO L124 PetriNetUnfolderBase]: 53493/93021 cut-off events. [2024-11-12 16:18:58,182 INFO L125 PetriNetUnfolderBase]: For 11737/11737 co-relation queries the response was YES. [2024-11-12 16:18:58,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175485 conditions, 93021 events. 53493/93021 cut-off events. For 11737/11737 co-relation queries the response was YES. Maximal size of possible extension queue 2258. Compared 900059 event pairs, 53493 based on Foata normal form. 0/91041 useless extension candidates. Maximal degree in co-relation 130155. Up to 74136 conditions per place. [2024-11-12 16:18:58,728 INFO L140 encePairwiseOnDemand]: 123/136 looper letters, 48 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2024-11-12 16:18:58,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 103 transitions, 346 flow [2024-11-12 16:18:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:18:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:18:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2024-11-12 16:18:58,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-12 16:18:58,730 INFO L175 Difference]: Start difference. First operand has 126 places, 115 transitions, 272 flow. Second operand 3 states and 221 transitions. [2024-11-12 16:18:58,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 103 transitions, 346 flow [2024-11-12 16:18:58,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 103 transitions, 340 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-12 16:18:58,732 INFO L231 Difference]: Finished difference. Result has 114 places, 103 transitions, 244 flow [2024-11-12 16:18:58,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=114, PETRI_TRANSITIONS=103} [2024-11-12 16:18:58,733 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -7 predicate places. [2024-11-12 16:18:58,733 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 103 transitions, 244 flow [2024-11-12 16:18:58,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 16:18:58,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:18:58,733 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-11-12 16:18:58,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:18:58,733 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:18:58,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:18:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1420931934, now seen corresponding path program 1 times [2024-11-12 16:18:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:18:58,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272355215] [2024-11-12 16:18:58,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:18:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:18:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:18:58,802 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 16:18:58,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:18:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272355215] [2024-11-12 16:18:58,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272355215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:18:58,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:18:58,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:18:58,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987274212] [2024-11-12 16:18:58,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:18:58,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:18:58,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:18:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:18:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:18:58,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 136 [2024-11-12 16:18:58,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 103 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 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 16:18:58,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:18:58,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 136 [2024-11-12 16:18:58,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:19:05,528 INFO L124 PetriNetUnfolderBase]: 56397/99398 cut-off events. [2024-11-12 16:19:05,528 INFO L125 PetriNetUnfolderBase]: For 15466/15466 co-relation queries the response was YES. [2024-11-12 16:19:05,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188174 conditions, 99398 events. 56397/99398 cut-off events. For 15466/15466 co-relation queries the response was YES. Maximal size of possible extension queue 2549. Compared 995450 event pairs, 14540 based on Foata normal form. 288/98173 useless extension candidates. Maximal degree in co-relation 188162. Up to 71281 conditions per place. [2024-11-12 16:19:06,132 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 118 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2024-11-12 16:19:06,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 175 transitions, 632 flow [2024-11-12 16:19:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:19:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:19:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 449 transitions. [2024-11-12 16:19:06,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6602941176470588 [2024-11-12 16:19:06,134 INFO L175 Difference]: Start difference. First operand has 114 places, 103 transitions, 244 flow. Second operand 5 states and 449 transitions. [2024-11-12 16:19:06,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 175 transitions, 632 flow [2024-11-12 16:19:06,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 175 transitions, 631 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:19:06,150 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 257 flow [2024-11-12 16:19:06,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2024-11-12 16:19:06,151 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2024-11-12 16:19:06,151 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 257 flow [2024-11-12 16:19:06,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:19:06,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:19:06,151 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:19:06,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:19:06,151 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-12 16:19:06,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:19:06,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1613608021, now seen corresponding path program 1 times [2024-11-12 16:19:06,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:19:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805789396] [2024-11-12 16:19:06,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:19:06,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:19:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:19:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:19:06,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:19:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805789396] [2024-11-12 16:19:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805789396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:19:06,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:19:06,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:19:06,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795085415] [2024-11-12 16:19:06,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:19:06,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:19:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:19:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:19:06,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:19:06,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2024-11-12 16:19:06,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:19:06,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:19:06,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2024-11-12 16:19:06,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand