./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/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-dev-4a390ef-m [2024-10-24 19:10:54,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:10:54,631 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:10:54,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:10:54,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:10:54,651 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:10:54,651 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:10:54,652 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:10:54,652 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:10:54,652 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:10:54,653 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:10:54,653 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:10:54,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:10:54,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:10:54,658 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:10:54,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:10:54,659 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:10:54,659 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:10:54,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:10:54,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:10:54,660 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:10:54,660 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:10:54,660 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:10:54,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:10:54,661 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:10:54,661 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:10:54,661 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:10:54,661 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:10:54,662 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:10:54,662 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:10:54,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:10:54,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:10:54,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:10:54,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:10:54,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:10:54,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:10:54,666 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:10:54,667 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:10:54,667 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:10:54,675 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:10:54,675 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:10:54,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:10:54,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2024-10-24 19:10:54,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:10:54,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:10:54,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:10:54,933 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:10:54,934 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:10:54,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-10-24 19:10:56,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:10:56,470 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:10:56,471 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-10-24 19:10:56,487 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49982d8a/023eb8ae24f44fe58a56df70e9aa261a/FLAG5af883e68 [2024-10-24 19:10:56,501 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49982d8a/023eb8ae24f44fe58a56df70e9aa261a [2024-10-24 19:10:56,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:10:56,506 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:10:56,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:10:56,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:10:56,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:10:56,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:56,516 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2d7c65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56, skipping insertion in model container [2024-10-24 19:10:56,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:56,556 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:10:56,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:10:56,871 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:10:56,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:10:56,947 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:10:56,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56 WrapperNode [2024-10-24 19:10:56,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:10:56,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:10:56,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:10:56,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:10:56,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:56,968 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:56,994 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-10-24 19:10:56,995 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:10:56,996 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:10:56,996 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:10:56,996 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:10:57,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,008 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,030 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]. [2024-10-24 19:10:57,031 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,031 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,041 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:10:57,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:10:57,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:10:57,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:10:57,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (1/1) ... [2024-10-24 19:10:57,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:10:57,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:10:57,089 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) [2024-10-24 19:10:57,095 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 [2024-10-24 19:10:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:10:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:10:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 19:10:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 19:10:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:10:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:10:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 19:10:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 19:10:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 19:10:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:10:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 19:10:57,140 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 19:10:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:10:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 19:10:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 19:10:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 19:10:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 19:10:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:10:57,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:10:57,143 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:10:57,271 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:10:57,273 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:10:57,498 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:10:57,499 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:10:57,621 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:10:57,621 INFO L314 CfgBuilder]: Removed 9 assume(true) statements. [2024-10-24 19:10:57,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:10:57 BoogieIcfgContainer [2024-10-24 19:10:57,622 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:10:57,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:10:57,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:10:57,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:10:57,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:10:56" (1/3) ... [2024-10-24 19:10:57,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a1bebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:10:57, skipping insertion in model container [2024-10-24 19:10:57,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:10:56" (2/3) ... [2024-10-24 19:10:57,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a1bebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:10:57, skipping insertion in model container [2024-10-24 19:10:57,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:10:57" (3/3) ... [2024-10-24 19:10:57,631 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2024-10-24 19:10:57,646 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:10:57,647 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-10-24 19:10:57,647 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:10:57,681 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 19:10:57,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 64 transitions, 132 flow [2024-10-24 19:10:57,788 INFO L124 PetriNetUnfolderBase]: 14/89 cut-off events. [2024-10-24 19:10:57,788 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:10:57,793 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. [2024-10-24 19:10:57,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 64 transitions, 132 flow [2024-10-24 19:10:57,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 64 transitions, 132 flow [2024-10-24 19:10:57,807 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:10:57,813 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;@1cb6eb81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:10:57,814 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-10-24 19:10:57,817 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:10:57,817 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-10-24 19:10:57,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:10:57,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:10:57,818 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:10:57,818 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)] === [2024-10-24 19:10:57,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:10:57,823 INFO L85 PathProgramCache]: Analyzing trace with hash 315801, now seen corresponding path program 1 times [2024-10-24 19:10:57,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:10:57,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627883272] [2024-10-24 19:10:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:10:57,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:10:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:10:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:10:58,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:10:58,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627883272] [2024-10-24 19:10:58,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627883272] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:10:58,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:10:58,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:10:58,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532423668] [2024-10-24 19:10:58,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:10:58,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:10:58,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:10:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:10:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:10:58,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-10-24 19:10:58,130 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) [2024-10-24 19:10:58,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:10:58,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-10-24 19:10:58,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:10:58,298 INFO L124 PetriNetUnfolderBase]: 121/445 cut-off events. [2024-10-24 19:10:58,298 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:10:58,300 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. [2024-10-24 19:10:58,307 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 35 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-10-24 19:10:58,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 210 flow [2024-10-24 19:10:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:10:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:10:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2024-10-24 19:10:58,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7395833333333334 [2024-10-24 19:10:58,321 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 132 flow. Second operand 3 states and 142 transitions. [2024-10-24 19:10:58,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 210 flow [2024-10-24 19:10:58,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:10:58,332 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 120 flow [2024-10-24 19:10:58,334 INFO L260 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} [2024-10-24 19:10:58,340 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-10-24 19:10:58,340 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 120 flow [2024-10-24 19:10:58,340 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) [2024-10-24 19:10:58,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:10:58,341 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-24 19:10:58,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:10:58,341 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)] === [2024-10-24 19:10:58,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:10:58,342 INFO L85 PathProgramCache]: Analyzing trace with hash -397124900, now seen corresponding path program 1 times [2024-10-24 19:10:58,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:10:58,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882299004] [2024-10-24 19:10:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:10:58,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:10:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:10:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:10:58,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:10:58,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882299004] [2024-10-24 19:10:58,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882299004] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:10:58,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959801822] [2024-10-24 19:10:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:10:58,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:10:58,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:10:58,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:10:58,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 19:10:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:10:58,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:10:58,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:10:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:10:58,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:10:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:10:58,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959801822] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:10:58,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:10:58,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-10-24 19:10:58,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618480881] [2024-10-24 19:10:58,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:10:58,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:10:58,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:10:58,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:10:58,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:10:58,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 64 [2024-10-24 19:10:58,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:10:58,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:10:58,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 64 [2024-10-24 19:10:58,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:10:58,695 INFO L124 PetriNetUnfolderBase]: 33/141 cut-off events. [2024-10-24 19:10:58,697 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-10-24 19:10:58,698 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. [2024-10-24 19:10:58,699 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 27 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-10-24 19:10:58,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 164 flow [2024-10-24 19:10:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:10:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:10:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-10-24 19:10:58,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57421875 [2024-10-24 19:10:58,702 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 120 flow. Second operand 4 states and 147 transitions. [2024-10-24 19:10:58,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 164 flow [2024-10-24 19:10:58,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:10:58,703 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 78 flow [2024-10-24 19:10:58,704 INFO L260 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} [2024-10-24 19:10:58,704 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, -16 predicate places. [2024-10-24 19:10:58,705 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 78 flow [2024-10-24 19:10:58,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:10:58,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:10:58,705 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-24 19:10:58,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 19:10:58,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:10:58,906 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)] === [2024-10-24 19:10:58,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:10:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 574030373, now seen corresponding path program 1 times [2024-10-24 19:10:58,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:10:58,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922694679] [2024-10-24 19:10:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:10:58,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:10:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:10:58,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 19:10:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:10:58,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 19:10:58,979 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 19:10:58,980 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-10-24 19:10:58,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (20 of 22 remaining) [2024-10-24 19:10:58,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (19 of 22 remaining) [2024-10-24 19:10:58,982 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2024-10-24 19:10:58,983 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2024-10-24 19:10:58,983 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (16 of 22 remaining) [2024-10-24 19:10:58,983 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2024-10-24 19:10:58,984 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2024-10-24 19:10:58,984 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2024-10-24 19:10:58,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2024-10-24 19:10:58,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2024-10-24 19:10:58,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2024-10-24 19:10:58,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2024-10-24 19:10:58,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2024-10-24 19:10:58,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2024-10-24 19:10:58,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2024-10-24 19:10:58,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2024-10-24 19:10:58,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2024-10-24 19:10:58,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2024-10-24 19:10:58,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2024-10-24 19:10:58,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2024-10-24 19:10:58,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2024-10-24 19:10:58,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 19:10:58,987 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-24 19:10:58,989 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 19:10:58,990 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 19:10:59,014 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 19:10:59,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 100 transitions, 210 flow [2024-10-24 19:10:59,039 INFO L124 PetriNetUnfolderBase]: 24/151 cut-off events. [2024-10-24 19:10:59,043 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:10:59,045 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. [2024-10-24 19:10:59,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 100 transitions, 210 flow [2024-10-24 19:10:59,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 100 transitions, 210 flow [2024-10-24 19:10:59,048 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:10:59,049 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;@1cb6eb81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:10:59,049 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-10-24 19:10:59,050 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:10:59,050 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-10-24 19:10:59,051 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:10:59,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:10:59,051 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:10:59,051 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)] === [2024-10-24 19:10:59,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:10:59,056 INFO L85 PathProgramCache]: Analyzing trace with hash 415101, now seen corresponding path program 1 times [2024-10-24 19:10:59,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:10:59,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038352232] [2024-10-24 19:10:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:10:59,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:10:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:10:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:10:59,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:10:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038352232] [2024-10-24 19:10:59,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038352232] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:10:59,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:10:59,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:10:59,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750803667] [2024-10-24 19:10:59,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:10:59,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:10:59,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:10:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:10:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:10:59,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 100 [2024-10-24 19:10:59,085 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) [2024-10-24 19:10:59,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:10:59,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 100 [2024-10-24 19:10:59,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:10:59,761 INFO L124 PetriNetUnfolderBase]: 3157/7121 cut-off events. [2024-10-24 19:10:59,761 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-10-24 19:10:59,777 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. [2024-10-24 19:10:59,813 INFO L140 encePairwiseOnDemand]: 80/100 looper letters, 48 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2024-10-24 19:10:59,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 97 transitions, 304 flow [2024-10-24 19:10:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:10:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:10:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2024-10-24 19:10:59,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-10-24 19:10:59,817 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 210 flow. Second operand 3 states and 215 transitions. [2024-10-24 19:10:59,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 97 transitions, 304 flow [2024-10-24 19:10:59,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:10:59,821 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 190 flow [2024-10-24 19:10:59,821 INFO L260 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} [2024-10-24 19:10:59,822 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, 2 predicate places. [2024-10-24 19:10:59,822 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 190 flow [2024-10-24 19:10:59,822 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) [2024-10-24 19:10:59,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:10:59,823 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-24 19:10:59,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 19:10:59,823 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)] === [2024-10-24 19:10:59,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:10:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1118318269, now seen corresponding path program 1 times [2024-10-24 19:10:59,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:10:59,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423897431] [2024-10-24 19:10:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:10:59,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:10:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:10:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:10:59,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:10:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423897431] [2024-10-24 19:10:59,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423897431] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:10:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122065984] [2024-10-24 19:10:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:10:59,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:10:59,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:10:59,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:10:59,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:10:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:10:59,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:10:59,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:10:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:10:59,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:00,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122065984] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:00,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:00,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-10-24 19:11:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122963193] [2024-10-24 19:11:00,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:00,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:11:00,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:00,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:11:00,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:11:00,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 100 [2024-10-24 19:11:00,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:00,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:00,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 100 [2024-10-24 19:11:00,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:00,743 INFO L124 PetriNetUnfolderBase]: 2805/6259 cut-off events. [2024-10-24 19:11:00,744 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2024-10-24 19:11:00,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11056 conditions, 6259 events. 2805/6259 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 53101 event pairs, 154 based on Foata normal form. 168/6142 useless extension candidates. Maximal degree in co-relation 10952. Up to 2857 conditions per place. [2024-10-24 19:11:00,785 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 91 selfloop transitions, 4 changer transitions 0/142 dead transitions. [2024-10-24 19:11:00,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 142 transitions, 494 flow [2024-10-24 19:11:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:11:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:11:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2024-10-24 19:11:00,789 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.666 [2024-10-24 19:11:00,789 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 190 flow. Second operand 5 states and 333 transitions. [2024-10-24 19:11:00,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 142 transitions, 494 flow [2024-10-24 19:11:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 142 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:00,797 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 192 flow [2024-10-24 19:11:00,798 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2024-10-24 19:11:00,799 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, 4 predicate places. [2024-10-24 19:11:00,800 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 192 flow [2024-10-24 19:11:00,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:00,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:00,800 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:11:00,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 19:11:01,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:01,005 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-24 19:11:01,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:01,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1693868129, now seen corresponding path program 1 times [2024-10-24 19:11:01,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:01,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692349882] [2024-10-24 19:11:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:01,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:01,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692349882] [2024-10-24 19:11:01,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692349882] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:01,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:01,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:01,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775611469] [2024-10-24 19:11:01,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:01,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:01,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:01,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 100 [2024-10-24 19:11:01,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 192 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) [2024-10-24 19:11:01,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:01,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 100 [2024-10-24 19:11:01,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:01,576 INFO L124 PetriNetUnfolderBase]: 2805/6001 cut-off events. [2024-10-24 19:11:01,577 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2024-10-24 19:11:01,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11087 conditions, 6001 events. 2805/6001 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 47857 event pairs, 2805 based on Foata normal form. 0/5839 useless extension candidates. Maximal degree in co-relation 7988. Up to 4440 conditions per place. [2024-10-24 19:11:01,700 INFO L140 encePairwiseOnDemand]: 91/100 looper letters, 35 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2024-10-24 19:11:01,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 248 flow [2024-10-24 19:11:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2024-10-24 19:11:01,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2024-10-24 19:11:01,703 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 192 flow. Second operand 3 states and 163 transitions. [2024-10-24 19:11:01,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 248 flow [2024-10-24 19:11:01,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 75 transitions, 238 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-24 19:11:01,706 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 168 flow [2024-10-24 19:11:01,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2024-10-24 19:11:01,709 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -5 predicate places. [2024-10-24 19:11:01,709 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 168 flow [2024-10-24 19:11:01,709 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) [2024-10-24 19:11:01,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:01,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:11:01,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 19:11:01,709 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-24 19:11:01,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1693868128, now seen corresponding path program 1 times [2024-10-24 19:11:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:01,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480265700] [2024-10-24 19:11:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:01,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:01,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480265700] [2024-10-24 19:11:01,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480265700] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:01,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:01,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:01,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513596966] [2024-10-24 19:11:01,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:01,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:01,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:01,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 100 [2024-10-24 19:11:01,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 168 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) [2024-10-24 19:11:01,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:01,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 100 [2024-10-24 19:11:01,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:02,221 INFO L124 PetriNetUnfolderBase]: 2805/5743 cut-off events. [2024-10-24 19:11:02,222 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-10-24 19:11:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10384 conditions, 5743 events. 2805/5743 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 43818 event pairs, 2805 based on Foata normal form. 0/5581 useless extension candidates. Maximal degree in co-relation 10375. Up to 4440 conditions per place. [2024-10-24 19:11:02,244 INFO L140 encePairwiseOnDemand]: 91/100 looper letters, 34 selfloop transitions, 1 changer transitions 1/67 dead transitions. [2024-10-24 19:11:02,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 224 flow [2024-10-24 19:11:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2024-10-24 19:11:02,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2024-10-24 19:11:02,245 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 168 flow. Second operand 3 states and 163 transitions. [2024-10-24 19:11:02,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 67 transitions, 224 flow [2024-10-24 19:11:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:02,246 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 151 flow [2024-10-24 19:11:02,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-10-24 19:11:02,247 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -12 predicate places. [2024-10-24 19:11:02,247 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 151 flow [2024-10-24 19:11:02,247 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) [2024-10-24 19:11:02,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:02,247 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-10-24 19:11:02,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 19:11:02,247 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-24 19:11:02,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 88060204, now seen corresponding path program 1 times [2024-10-24 19:11:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:02,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421894668] [2024-10-24 19:11:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:02,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:11:02,259 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 19:11:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:11:02,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 19:11:02,276 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 19:11:02,276 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (29 of 30 remaining) [2024-10-24 19:11:02,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (28 of 30 remaining) [2024-10-24 19:11:02,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (27 of 30 remaining) [2024-10-24 19:11:02,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2024-10-24 19:11:02,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 30 remaining) [2024-10-24 19:11:02,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (24 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 30 remaining) [2024-10-24 19:11:02,278 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2024-10-24 19:11:02,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 30 remaining) [2024-10-24 19:11:02,281 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 30 remaining) [2024-10-24 19:11:02,282 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 30 remaining) [2024-10-24 19:11:02,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2024-10-24 19:11:02,283 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 30 remaining) [2024-10-24 19:11:02,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 19:11:02,283 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-10-24 19:11:02,283 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 19:11:02,284 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 19:11:02,309 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 19:11:02,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 136 transitions, 290 flow [2024-10-24 19:11:02,329 INFO L124 PetriNetUnfolderBase]: 34/213 cut-off events. [2024-10-24 19:11:02,330 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-24 19:11:02,331 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. [2024-10-24 19:11:02,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 136 transitions, 290 flow [2024-10-24 19:11:02,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 136 transitions, 290 flow [2024-10-24 19:11:02,333 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:11:02,335 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;@1cb6eb81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:11:02,335 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-10-24 19:11:02,336 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:11:02,336 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-10-24 19:11:02,336 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:11:02,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:02,337 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:11:02,337 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)] === [2024-10-24 19:11:02,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash 550149, now seen corresponding path program 1 times [2024-10-24 19:11:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:02,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539764776] [2024-10-24 19:11:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:02,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:02,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539764776] [2024-10-24 19:11:02,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539764776] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:02,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:02,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66336391] [2024-10-24 19:11:02,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:02,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:02,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:02,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 136 [2024-10-24 19:11:02,368 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) [2024-10-24 19:11:02,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:02,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 136 [2024-10-24 19:11:02,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:09,855 INFO L124 PetriNetUnfolderBase]: 58597/104897 cut-off events. [2024-10-24 19:11:09,855 INFO L125 PetriNetUnfolderBase]: For 1036/1036 co-relation queries the response was YES. [2024-10-24 19:11:10,099 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. [2024-10-24 19:11:10,648 INFO L140 encePairwiseOnDemand]: 110/136 looper letters, 60 selfloop transitions, 2 changer transitions 0/127 dead transitions. [2024-10-24 19:11:10,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 127 transitions, 396 flow [2024-10-24 19:11:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-10-24 19:11:10,651 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7034313725490197 [2024-10-24 19:11:10,652 INFO L175 Difference]: Start difference. First operand has 121 places, 136 transitions, 290 flow. Second operand 3 states and 287 transitions. [2024-10-24 19:11:10,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 127 transitions, 396 flow [2024-10-24 19:11:10,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 127 transitions, 394 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-24 19:11:10,657 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 256 flow [2024-10-24 19:11:10,657 INFO L260 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} [2024-10-24 19:11:10,658 INFO L277 CegarLoopForPetriNet]: 121 programPoint places, 2 predicate places. [2024-10-24 19:11:10,658 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 256 flow [2024-10-24 19:11:10,658 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) [2024-10-24 19:11:10,658 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:10,659 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-24 19:11:10,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 19:11:10,659 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)] === [2024-10-24 19:11:10,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1289160002, now seen corresponding path program 1 times [2024-10-24 19:11:10,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:10,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487380245] [2024-10-24 19:11:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:10,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:10,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:10,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487380245] [2024-10-24 19:11:10,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487380245] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:10,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175747348] [2024-10-24 19:11:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:10,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:10,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:10,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 19:11:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:10,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:11:10,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:10,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:10,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175747348] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:10,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:10,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-10-24 19:11:10,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020165674] [2024-10-24 19:11:10,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:10,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:11:10,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:10,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:11:10,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:11:10,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 136 [2024-10-24 19:11:10,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 67.42857142857143) internal successors, (472), 7 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:10,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:10,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 136 [2024-10-24 19:11:10,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:18,184 INFO L124 PetriNetUnfolderBase]: 53493/102594 cut-off events. [2024-10-24 19:11:18,184 INFO L125 PetriNetUnfolderBase]: For 6779/6779 co-relation queries the response was YES. [2024-10-24 19:11:18,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180976 conditions, 102594 events. 53493/102594 cut-off events. For 6779/6779 co-relation queries the response was YES. Maximal size of possible extension queue 2609. Compared 1125363 event pairs, 3168 based on Foata normal form. 1896/99766 useless extension candidates. Maximal degree in co-relation 15362. Up to 48217 conditions per place. [2024-10-24 19:11:18,859 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 149 selfloop transitions, 6 changer transitions 0/220 dead transitions. [2024-10-24 19:11:18,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 220 transitions, 780 flow [2024-10-24 19:11:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:11:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:11:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 549 transitions. [2024-10-24 19:11:18,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6727941176470589 [2024-10-24 19:11:18,863 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 256 flow. Second operand 6 states and 549 transitions. [2024-10-24 19:11:18,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 220 transitions, 780 flow [2024-10-24 19:11:18,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 220 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:18,875 INFO L231 Difference]: Finished difference. Result has 126 places, 115 transitions, 270 flow [2024-10-24 19:11:18,876 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=126, PETRI_TRANSITIONS=115} [2024-10-24 19:11:18,877 INFO L277 CegarLoopForPetriNet]: 121 programPoint places, 5 predicate places. [2024-10-24 19:11:18,877 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 115 transitions, 270 flow [2024-10-24 19:11:18,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.42857142857143) internal successors, (472), 7 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:18,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:18,878 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:11:18,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 19:11:19,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:19,084 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)] === [2024-10-24 19:11:19,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1613608022, now seen corresponding path program 1 times [2024-10-24 19:11:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:19,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927345840] [2024-10-24 19:11:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:19,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:19,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927345840] [2024-10-24 19:11:19,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927345840] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:19,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:19,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:19,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017628337] [2024-10-24 19:11:19,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:19,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:19,171 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2024-10-24 19:11:19,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 115 transitions, 270 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) [2024-10-24 19:11:19,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:19,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2024-10-24 19:11:19,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:26,002 INFO L124 PetriNetUnfolderBase]: 53493/92797 cut-off events. [2024-10-24 19:11:26,002 INFO L125 PetriNetUnfolderBase]: For 11606/11606 co-relation queries the response was YES. [2024-10-24 19:11:26,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174924 conditions, 92797 events. 53493/92797 cut-off events. For 11606/11606 co-relation queries the response was YES. Maximal size of possible extension queue 2250. Compared 896571 event pairs, 53493 based on Foata normal form. 0/90849 useless extension candidates. Maximal degree in co-relation 129811. Up to 74136 conditions per place. [2024-10-24 19:11:26,512 INFO L140 encePairwiseOnDemand]: 123/136 looper letters, 49 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2024-10-24 19:11:26,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 103 transitions, 346 flow [2024-10-24 19:11:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2024-10-24 19:11:26,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-10-24 19:11:26,514 INFO L175 Difference]: Start difference. First operand has 126 places, 115 transitions, 270 flow. Second operand 3 states and 221 transitions. [2024-10-24 19:11:26,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 103 transitions, 346 flow [2024-10-24 19:11:26,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 103 transitions, 331 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-24 19:11:26,519 INFO L231 Difference]: Finished difference. Result has 113 places, 103 transitions, 233 flow [2024-10-24 19:11:26,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=111, 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=233, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2024-10-24 19:11:26,520 INFO L277 CegarLoopForPetriNet]: 121 programPoint places, -8 predicate places. [2024-10-24 19:11:26,520 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 233 flow [2024-10-24 19:11:26,520 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) [2024-10-24 19:11:26,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:26,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:11:26,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 19:11:26,520 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-24 19:11:26,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1613608021, now seen corresponding path program 1 times [2024-10-24 19:11:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:26,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102696807] [2024-10-24 19:11:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:26,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:26,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102696807] [2024-10-24 19:11:26,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102696807] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:11:26,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:11:26,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:11:26,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760076176] [2024-10-24 19:11:26,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:11:26,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:11:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:26,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:11:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:11:26,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2024-10-24 19:11:26,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 233 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) [2024-10-24 19:11:26,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:26,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2024-10-24 19:11:26,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:11:32,743 INFO L124 PetriNetUnfolderBase]: 53493/89739 cut-off events. [2024-10-24 19:11:32,743 INFO L125 PetriNetUnfolderBase]: For 4307/4307 co-relation queries the response was YES. [2024-10-24 19:11:32,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166237 conditions, 89739 events. 53493/89739 cut-off events. For 4307/4307 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 829856 event pairs, 53493 based on Foata normal form. 0/87791 useless extension candidates. Maximal degree in co-relation 166227. Up to 74136 conditions per place. [2024-10-24 19:11:33,224 INFO L140 encePairwiseOnDemand]: 123/136 looper letters, 48 selfloop transitions, 1 changer transitions 1/91 dead transitions. [2024-10-24 19:11:33,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 91 transitions, 309 flow [2024-10-24 19:11:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:11:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:11:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2024-10-24 19:11:33,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-10-24 19:11:33,226 INFO L175 Difference]: Start difference. First operand has 113 places, 103 transitions, 233 flow. Second operand 3 states and 221 transitions. [2024-10-24 19:11:33,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 91 transitions, 309 flow [2024-10-24 19:11:33,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 91 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:11:33,228 INFO L231 Difference]: Finished difference. Result has 102 places, 90 transitions, 208 flow [2024-10-24 19:11:33,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=102, PETRI_TRANSITIONS=90} [2024-10-24 19:11:33,229 INFO L277 CegarLoopForPetriNet]: 121 programPoint places, -19 predicate places. [2024-10-24 19:11:33,229 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 90 transitions, 208 flow [2024-10-24 19:11:33,229 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) [2024-10-24 19:11:33,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:11:33,229 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:11:33,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-24 19:11:33,230 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-24 19:11:33,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:11:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash -283972576, now seen corresponding path program 1 times [2024-10-24 19:11:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:11:33,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469738913] [2024-10-24 19:11:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:33,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:11:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:33,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:11:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469738913] [2024-10-24 19:11:33,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469738913] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:11:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447242378] [2024-10-24 19:11:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:11:33,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:11:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:11:33,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:11:33,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 19:11:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:11:33,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 19:11:33,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:11:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:33,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:11:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:11:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447242378] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:11:33,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:11:33,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-24 19:11:33,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940993917] [2024-10-24 19:11:33,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:11:33,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:11:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:11:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:11:33,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:11:33,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 136 [2024-10-24 19:11:33,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 90 transitions, 208 flow. Second operand has 9 states, 9 states have (on average 67.88888888888889) internal successors, (611), 9 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:11:33,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:11:33,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 136 [2024-10-24 19:11:33,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand