./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d 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/pthread/reorder_2.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 eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:07:46,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:07:46,400 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:07:46,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:07:46,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:07:46,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:07:46,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:07:46,440 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:07:46,440 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:07:46,442 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:07:46,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:07:46,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:07:46,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:07:46,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:07:46,445 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:07:46,445 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:07:46,445 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:07:46,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:07:46,446 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:07:46,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:07:46,448 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:07:46,448 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:07:46,448 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:07:46,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:07:46,449 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:07:46,449 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:07:46,449 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:07:46,449 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:07:46,449 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:07:46,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:07:46,450 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:07:46,450 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:07:46,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:07:46,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:07:46,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:07:46,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:07:46,451 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:07:46,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:07:46,451 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:07:46,451 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:07:46,453 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:07:46,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:07:46,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eaeb1d72262bd1e189945b98598b3acb68c08676109949c39074605b8c62cb69 [2024-10-13 12:07:46,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:07:46,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:07:46,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:07:46,699 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:07:46,699 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:07:46,700 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_2.i [2024-10-13 12:07:48,099 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:07:48,366 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:07:48,367 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_2.i [2024-10-13 12:07:48,389 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f68135fa/f3c728b0d52447a990bf07718d24eb72/FLAG0f97ad9cc [2024-10-13 12:07:48,669 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f68135fa/f3c728b0d52447a990bf07718d24eb72 [2024-10-13 12:07:48,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:07:48,673 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:07:48,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:07:48,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:07:48,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:07:48,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:07:48" (1/1) ... [2024-10-13 12:07:48,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@146f8fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:48, skipping insertion in model container [2024-10-13 12:07:48,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:07:48" (1/1) ... [2024-10-13 12:07:48,742 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:07:49,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:07:49,253 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:07:49,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:07:49,364 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:07:49,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49 WrapperNode [2024-10-13 12:07:49,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:07:49,366 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:07:49,366 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:07:49,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:07:49,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,399 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,428 INFO L138 Inliner]: procedures = 372, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 139 [2024-10-13 12:07:49,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:07:49,431 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:07:49,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:07:49,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:07:49,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,446 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,465 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-13 12:07:49,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,475 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:07:49,494 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:07:49,494 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:07:49,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:07:49,495 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (1/1) ... [2024-10-13 12:07:49,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:07:49,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:07:49,527 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) [2024-10-13 12:07:49,529 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 [2024-10-13 12:07:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 12:07:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:07:49,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:07:49,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 12:07:49,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:07:49,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:07:49,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:07:49,622 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2024-10-13 12:07:49,622 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2024-10-13 12:07:49,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:07:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:07:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:07:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:07:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2024-10-13 12:07:49,627 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2024-10-13 12:07:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:07:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:07:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:07:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:07:49,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:07:49,630 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:07:49,751 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:07:49,752 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:07:49,993 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:07:49,993 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:07:50,091 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:07:50,091 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 12:07:50,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:07:50 BoogieIcfgContainer [2024-10-13 12:07:50,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:07:50,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:07:50,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:07:50,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:07:50,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:07:48" (1/3) ... [2024-10-13 12:07:50,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf5c20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:07:50, skipping insertion in model container [2024-10-13 12:07:50,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:07:49" (2/3) ... [2024-10-13 12:07:50,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf5c20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:07:50, skipping insertion in model container [2024-10-13 12:07:50,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:07:50" (3/3) ... [2024-10-13 12:07:50,099 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_2.i [2024-10-13 12:07:50,114 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:07:50,114 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-13 12:07:50,114 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:07:50,156 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 12:07:50,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 59 transitions, 138 flow [2024-10-13 12:07:50,239 INFO L124 PetriNetUnfolderBase]: 14/137 cut-off events. [2024-10-13 12:07:50,240 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 12:07:50,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 14/137 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 669 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 69. Up to 7 conditions per place. [2024-10-13 12:07:50,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 59 transitions, 138 flow [2024-10-13 12:07:50,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 59 transitions, 138 flow [2024-10-13 12:07:50,254 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:07:50,261 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;@5a499189, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:07:50,261 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-13 12:07:50,267 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:07:50,268 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:07:50,268 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:07:50,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:50,269 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:07:50,269 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:07:50,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash 11896378, now seen corresponding path program 1 times [2024-10-13 12:07:50,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:50,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426215153] [2024-10-13 12:07:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:50,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:50,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426215153] [2024-10-13 12:07:50,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426215153] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:50,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:50,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:07:50,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502058790] [2024-10-13 12:07:50,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:50,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:07:50,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:50,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:07:50,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:07:50,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-10-13 12:07:50,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 138 flow. Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2024-10-13 12:07:50,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:50,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-10-13 12:07:50,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:50,542 INFO L124 PetriNetUnfolderBase]: 86/377 cut-off events. [2024-10-13 12:07:50,542 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-13 12:07:50,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 377 events. 86/377 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2581 event pairs, 71 based on Foata normal form. 44/295 useless extension candidates. Maximal degree in co-relation 375. Up to 190 conditions per place. [2024-10-13 12:07:50,546 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 24 selfloop transitions, 0 changer transitions 0/53 dead transitions. [2024-10-13 12:07:50,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 174 flow [2024-10-13 12:07:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:07:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:07:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 87 transitions. [2024-10-13 12:07:50,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7372881355932204 [2024-10-13 12:07:50,560 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 138 flow. Second operand 2 states and 87 transitions. [2024-10-13 12:07:50,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 174 flow [2024-10-13 12:07:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:07:50,566 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 126 flow [2024-10-13 12:07:50,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-10-13 12:07:50,575 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2024-10-13 12:07:50,576 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 126 flow [2024-10-13 12:07:50,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2024-10-13 12:07:50,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:50,577 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:07:50,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:07:50,578 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:07:50,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash 368786992, now seen corresponding path program 1 times [2024-10-13 12:07:50,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:50,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456506444] [2024-10-13 12:07:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:50,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:50,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:50,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456506444] [2024-10-13 12:07:50,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456506444] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:50,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:50,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:07:50,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640515967] [2024-10-13 12:07:50,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:50,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:07:50,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:07:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:07:50,810 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-10-13 12:07:50,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-10-13 12:07:50,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:50,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-10-13 12:07:50,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:50,926 INFO L124 PetriNetUnfolderBase]: 97/370 cut-off events. [2024-10-13 12:07:50,929 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-13 12:07:50,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 370 events. 97/370 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2474 event pairs, 65 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 607. Up to 168 conditions per place. [2024-10-13 12:07:50,933 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 27 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2024-10-13 12:07:50,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 186 flow [2024-10-13 12:07:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:07:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:07:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-13 12:07:50,936 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5988700564971752 [2024-10-13 12:07:50,936 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 126 flow. Second operand 3 states and 106 transitions. [2024-10-13 12:07:50,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 186 flow [2024-10-13 12:07:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 186 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:07:50,941 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 126 flow [2024-10-13 12:07:50,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-10-13 12:07:50,942 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2024-10-13 12:07:50,942 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 126 flow [2024-10-13 12:07:50,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-10-13 12:07:50,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:50,942 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:07:50,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:07:50,942 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:07:50,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash 368786993, now seen corresponding path program 1 times [2024-10-13 12:07:50,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:50,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822271654] [2024-10-13 12:07:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:50,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:51,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:51,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822271654] [2024-10-13 12:07:51,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822271654] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:51,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:51,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:07:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650183744] [2024-10-13 12:07:51,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:51,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:07:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:51,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:07:51,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:07:51,276 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-10-13 12:07:51,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-10-13 12:07:51,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:51,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-10-13 12:07:51,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:51,494 INFO L124 PetriNetUnfolderBase]: 184/699 cut-off events. [2024-10-13 12:07:51,494 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-10-13 12:07:51,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 699 events. 184/699 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5573 event pairs, 124 based on Foata normal form. 1/525 useless extension candidates. Maximal degree in co-relation 1174. Up to 215 conditions per place. [2024-10-13 12:07:51,501 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 47 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2024-10-13 12:07:51,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 300 flow [2024-10-13 12:07:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:07:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:07:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2024-10-13 12:07:51,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6822033898305084 [2024-10-13 12:07:51,506 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 126 flow. Second operand 4 states and 161 transitions. [2024-10-13 12:07:51,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 300 flow [2024-10-13 12:07:51,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:07:51,509 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 148 flow [2024-10-13 12:07:51,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-10-13 12:07:51,511 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2024-10-13 12:07:51,511 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 148 flow [2024-10-13 12:07:51,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-10-13 12:07:51,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:51,511 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:51,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:07:51,512 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:07:51,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:51,513 INFO L85 PathProgramCache]: Analyzing trace with hash 39828972, now seen corresponding path program 1 times [2024-10-13 12:07:51,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:51,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310827848] [2024-10-13 12:07:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:51,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:51,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:51,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310827848] [2024-10-13 12:07:51,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310827848] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:51,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:51,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:07:51,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307422671] [2024-10-13 12:07:51,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:51,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:07:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:51,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:07:51,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:07:51,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-10-13 12:07:51,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-10-13 12:07:51,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:51,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-10-13 12:07:51,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:51,918 INFO L124 PetriNetUnfolderBase]: 226/748 cut-off events. [2024-10-13 12:07:51,919 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-10-13 12:07:51,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 748 events. 226/748 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6029 event pairs, 182 based on Foata normal form. 1/518 useless extension candidates. Maximal degree in co-relation 1317. Up to 488 conditions per place. [2024-10-13 12:07:51,925 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 36 selfloop transitions, 7 changer transitions 2/67 dead transitions. [2024-10-13 12:07:51,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 271 flow [2024-10-13 12:07:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:07:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:07:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-10-13 12:07:51,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.597457627118644 [2024-10-13 12:07:51,928 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 148 flow. Second operand 4 states and 141 transitions. [2024-10-13 12:07:51,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 271 flow [2024-10-13 12:07:51,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:07:51,932 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 186 flow [2024-10-13 12:07:51,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-10-13 12:07:51,934 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-10-13 12:07:51,934 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 186 flow [2024-10-13 12:07:51,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2024-10-13 12:07:51,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:51,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:51,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:07:51,936 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:07:51,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1234699897, now seen corresponding path program 1 times [2024-10-13 12:07:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:51,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012968422] [2024-10-13 12:07:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:51,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:51,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012968422] [2024-10-13 12:07:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012968422] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:51,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:51,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:07:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601228358] [2024-10-13 12:07:51,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:51,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:07:51,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:07:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:07:51,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-10-13 12:07:51,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2024-10-13 12:07:51,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:51,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-10-13 12:07:51,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:52,091 INFO L124 PetriNetUnfolderBase]: 200/675 cut-off events. [2024-10-13 12:07:52,091 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-10-13 12:07:52,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 675 events. 200/675 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5279 event pairs, 136 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 1292. Up to 349 conditions per place. [2024-10-13 12:07:52,096 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 30 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-10-13 12:07:52,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 256 flow [2024-10-13 12:07:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:07:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:07:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-13 12:07:52,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5988700564971752 [2024-10-13 12:07:52,098 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 186 flow. Second operand 3 states and 106 transitions. [2024-10-13 12:07:52,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 256 flow [2024-10-13 12:07:52,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 245 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-13 12:07:52,104 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 179 flow [2024-10-13 12:07:52,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-10-13 12:07:52,105 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-10-13 12:07:52,107 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 179 flow [2024-10-13 12:07:52,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2024-10-13 12:07:52,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:52,107 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:52,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:07:52,108 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:07:52,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:52,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1234699898, now seen corresponding path program 1 times [2024-10-13 12:07:52,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:52,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454997864] [2024-10-13 12:07:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:52,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:52,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454997864] [2024-10-13 12:07:52,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454997864] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:52,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:52,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:07:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743611123] [2024-10-13 12:07:52,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:52,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:07:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:07:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:07:52,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-10-13 12:07:52,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 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) [2024-10-13 12:07:52,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:52,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-10-13 12:07:52,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:52,516 INFO L124 PetriNetUnfolderBase]: 271/784 cut-off events. [2024-10-13 12:07:52,516 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-10-13 12:07:52,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 784 events. 271/784 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6058 event pairs, 54 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 1602. Up to 238 conditions per place. [2024-10-13 12:07:52,522 INFO L140 encePairwiseOnDemand]: 46/59 looper letters, 41 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-10-13 12:07:52,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 357 flow [2024-10-13 12:07:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:07:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:07:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 175 transitions. [2024-10-13 12:07:52,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5932203389830508 [2024-10-13 12:07:52,524 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 179 flow. Second operand 5 states and 175 transitions. [2024-10-13 12:07:52,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 357 flow [2024-10-13 12:07:52,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:07:52,527 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 268 flow [2024-10-13 12:07:52,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-10-13 12:07:52,528 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-10-13 12:07:52,528 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 268 flow [2024-10-13 12:07:52,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 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) [2024-10-13 12:07:52,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:52,529 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:52,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:07:52,529 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:07:52,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:52,530 INFO L85 PathProgramCache]: Analyzing trace with hash 226424391, now seen corresponding path program 1 times [2024-10-13 12:07:52,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:52,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885397188] [2024-10-13 12:07:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:52,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:52,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885397188] [2024-10-13 12:07:52,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885397188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:07:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800207151] [2024-10-13 12:07:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:52,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:07:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:07:52,753 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) [2024-10-13 12:07:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:07:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:52,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:07:52,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:07:52,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:07:52,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-10-13 12:07:52,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-13 12:07:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:52,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:07:53,091 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 12:07:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:53,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800207151] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:07:53,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:07:53,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 11 [2024-10-13 12:07:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899389335] [2024-10-13 12:07:53,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:07:53,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:07:53,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:07:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-13 12:07:53,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-10-13 12:07:53,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 26.846153846153847) internal successors, (349), 13 states have internal predecessors, (349), 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) [2024-10-13 12:07:53,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:53,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-10-13 12:07:53,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:53,468 INFO L124 PetriNetUnfolderBase]: 126/429 cut-off events. [2024-10-13 12:07:53,469 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2024-10-13 12:07:53,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 429 events. 126/429 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2793 event pairs, 59 based on Foata normal form. 4/384 useless extension candidates. Maximal degree in co-relation 1031. Up to 233 conditions per place. [2024-10-13 12:07:53,473 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 41 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-10-13 12:07:53,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 396 flow [2024-10-13 12:07:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:07:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:07:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-10-13 12:07:53,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5423728813559322 [2024-10-13 12:07:53,475 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 268 flow. Second operand 6 states and 192 transitions. [2024-10-13 12:07:53,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 396 flow [2024-10-13 12:07:53,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:07:53,479 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 297 flow [2024-10-13 12:07:53,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-10-13 12:07:53,481 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-10-13 12:07:53,481 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 297 flow [2024-10-13 12:07:53,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.846153846153847) internal successors, (349), 13 states have internal predecessors, (349), 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) [2024-10-13 12:07:53,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:53,481 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:53,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 12:07:53,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:07:53,686 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:07:53,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1570778131, now seen corresponding path program 1 times [2024-10-13 12:07:53,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:53,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199418667] [2024-10-13 12:07:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:53,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:07:53,703 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:07:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:07:53,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:07:53,739 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:07:53,740 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-10-13 12:07:53,745 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2024-10-13 12:07:53,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (12 of 15 remaining) [2024-10-13 12:07:53,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (11 of 15 remaining) [2024-10-13 12:07:53,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2024-10-13 12:07:53,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2024-10-13 12:07:53,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2024-10-13 12:07:53,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2024-10-13 12:07:53,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2024-10-13 12:07:53,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2024-10-13 12:07:53,747 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2024-10-13 12:07:53,747 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2024-10-13 12:07:53,747 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2024-10-13 12:07:53,747 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 15 remaining) [2024-10-13 12:07:53,747 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2024-10-13 12:07:53,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:07:53,747 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:53,750 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:07:53,750 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:07:53,779 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-10-13 12:07:53,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 80 transitions, 204 flow [2024-10-13 12:07:53,810 INFO L124 PetriNetUnfolderBase]: 71/450 cut-off events. [2024-10-13 12:07:53,811 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2024-10-13 12:07:53,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 450 events. 71/450 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2750 event pairs, 1 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 276. Up to 32 conditions per place. [2024-10-13 12:07:53,813 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 80 transitions, 204 flow [2024-10-13 12:07:53,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 80 transitions, 204 flow [2024-10-13 12:07:53,816 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:07:53,817 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;@5a499189, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:07:53,817 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-10-13 12:07:53,818 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:07:53,818 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:07:53,818 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:07:53,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:53,819 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:07:53,819 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:07:53,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:53,819 INFO L85 PathProgramCache]: Analyzing trace with hash 14297530, now seen corresponding path program 1 times [2024-10-13 12:07:53,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:53,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353317112] [2024-10-13 12:07:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:53,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353317112] [2024-10-13 12:07:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353317112] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:53,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:07:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125467525] [2024-10-13 12:07:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:53,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:07:53,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:07:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:07:53,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2024-10-13 12:07:53,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:07:53,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:53,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2024-10-13 12:07:53,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:54,328 INFO L124 PetriNetUnfolderBase]: 1996/4913 cut-off events. [2024-10-13 12:07:54,328 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-10-13 12:07:54,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 4913 events. 1996/4913 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 46904 event pairs, 1718 based on Foata normal form. 1035/4803 useless extension candidates. Maximal degree in co-relation 3153. Up to 3077 conditions per place. [2024-10-13 12:07:54,354 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 33 selfloop transitions, 0 changer transitions 0/71 dead transitions. [2024-10-13 12:07:54,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 252 flow [2024-10-13 12:07:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:07:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:07:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 116 transitions. [2024-10-13 12:07:54,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.725 [2024-10-13 12:07:54,356 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 204 flow. Second operand 2 states and 116 transitions. [2024-10-13 12:07:54,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 252 flow [2024-10-13 12:07:54,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:07:54,358 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 186 flow [2024-10-13 12:07:54,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-10-13 12:07:54,358 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2024-10-13 12:07:54,359 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 186 flow [2024-10-13 12:07:54,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:07:54,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:54,359 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:07:54,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 12:07:54,359 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:07:54,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:54,360 INFO L85 PathProgramCache]: Analyzing trace with hash 443222782, now seen corresponding path program 1 times [2024-10-13 12:07:54,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:54,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774676297] [2024-10-13 12:07:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:54,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:54,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774676297] [2024-10-13 12:07:54,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774676297] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:54,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:54,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:07:54,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884024184] [2024-10-13 12:07:54,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:54,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:07:54,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:07:54,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:07:54,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 80 [2024-10-13 12:07:54,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2024-10-13 12:07:54,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:54,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 80 [2024-10-13 12:07:54,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:54,945 INFO L124 PetriNetUnfolderBase]: 2241/4944 cut-off events. [2024-10-13 12:07:54,947 INFO L125 PetriNetUnfolderBase]: For 811/811 co-relation queries the response was YES. [2024-10-13 12:07:54,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8844 conditions, 4944 events. 2241/4944 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 44568 event pairs, 1564 based on Foata normal form. 0/4098 useless extension candidates. Maximal degree in co-relation 8837. Up to 2701 conditions per place. [2024-10-13 12:07:54,976 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 39 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-10-13 12:07:54,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 276 flow [2024-10-13 12:07:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:07:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:07:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-10-13 12:07:54,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-13 12:07:54,978 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 186 flow. Second operand 3 states and 145 transitions. [2024-10-13 12:07:54,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 276 flow [2024-10-13 12:07:54,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:07:54,981 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 186 flow [2024-10-13 12:07:54,981 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-10-13 12:07:54,981 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2024-10-13 12:07:54,982 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 186 flow [2024-10-13 12:07:54,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2024-10-13 12:07:54,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:54,982 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:07:54,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 12:07:54,984 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:07:54,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash 443222783, now seen corresponding path program 1 times [2024-10-13 12:07:54,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:54,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259756033] [2024-10-13 12:07:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:54,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259756033] [2024-10-13 12:07:55,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259756033] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:55,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:55,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:07:55,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626172786] [2024-10-13 12:07:55,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:55,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:07:55,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:07:55,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:07:55,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 80 [2024-10-13 12:07:55,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2024-10-13 12:07:55,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:55,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 80 [2024-10-13 12:07:55,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:55,992 INFO L124 PetriNetUnfolderBase]: 4433/9850 cut-off events. [2024-10-13 12:07:55,992 INFO L125 PetriNetUnfolderBase]: For 2286/2286 co-relation queries the response was YES. [2024-10-13 12:07:56,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17834 conditions, 9850 events. 4433/9850 cut-off events. For 2286/2286 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 100432 event pairs, 3894 based on Foata normal form. 1/8186 useless extension candidates. Maximal degree in co-relation 17826. Up to 3472 conditions per place. [2024-10-13 12:07:56,065 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 66 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2024-10-13 12:07:56,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 104 transitions, 440 flow [2024-10-13 12:07:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:07:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:07:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2024-10-13 12:07:56,067 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-10-13 12:07:56,067 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 186 flow. Second operand 4 states and 216 transitions. [2024-10-13 12:07:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 104 transitions, 440 flow [2024-10-13 12:07:56,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 104 transitions, 432 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:07:56,084 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 208 flow [2024-10-13 12:07:56,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-10-13 12:07:56,085 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2024-10-13 12:07:56,085 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 208 flow [2024-10-13 12:07:56,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2024-10-13 12:07:56,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:56,085 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:56,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 12:07:56,086 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:07:56,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1353401580, now seen corresponding path program 1 times [2024-10-13 12:07:56,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:56,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310202209] [2024-10-13 12:07:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:56,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:56,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310202209] [2024-10-13 12:07:56,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310202209] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:56,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:56,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:07:56,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505869796] [2024-10-13 12:07:56,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:56,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:07:56,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:56,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:07:56,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:07:56,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-10-13 12:07:56,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-10-13 12:07:56,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:56,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-10-13 12:07:56,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:57,144 INFO L124 PetriNetUnfolderBase]: 5403/10829 cut-off events. [2024-10-13 12:07:57,145 INFO L125 PetriNetUnfolderBase]: For 1618/1618 co-relation queries the response was YES. [2024-10-13 12:07:57,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20133 conditions, 10829 events. 5403/10829 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 106068 event pairs, 4876 based on Foata normal form. 1/8444 useless extension candidates. Maximal degree in co-relation 20123. Up to 8400 conditions per place. [2024-10-13 12:07:57,210 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 46 selfloop transitions, 7 changer transitions 2/86 dead transitions. [2024-10-13 12:07:57,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 355 flow [2024-10-13 12:07:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:07:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:07:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 187 transitions. [2024-10-13 12:07:57,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-10-13 12:07:57,212 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 208 flow. Second operand 4 states and 187 transitions. [2024-10-13 12:07:57,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 355 flow [2024-10-13 12:07:57,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 353 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:07:57,214 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 252 flow [2024-10-13 12:07:57,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2024-10-13 12:07:57,216 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2024-10-13 12:07:57,216 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 252 flow [2024-10-13 12:07:57,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-10-13 12:07:57,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:57,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:57,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 12:07:57,217 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:07:57,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash -994222137, now seen corresponding path program 1 times [2024-10-13 12:07:57,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:57,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099100688] [2024-10-13 12:07:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:57,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:57,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:57,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099100688] [2024-10-13 12:07:57,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099100688] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:57,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:57,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:07:57,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461227411] [2024-10-13 12:07:57,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:57,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:07:57,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:57,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:07:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:07:57,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 80 [2024-10-13 12:07:57,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2024-10-13 12:07:57,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:57,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 80 [2024-10-13 12:07:57,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:58,128 INFO L124 PetriNetUnfolderBase]: 4735/9573 cut-off events. [2024-10-13 12:07:58,128 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2024-10-13 12:07:58,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18847 conditions, 9573 events. 4735/9573 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 91386 event pairs, 3414 based on Foata normal form. 0/8840 useless extension candidates. Maximal degree in co-relation 18835. Up to 5776 conditions per place. [2024-10-13 12:07:58,196 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 43 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-10-13 12:07:58,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 354 flow [2024-10-13 12:07:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:07:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:07:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-10-13 12:07:58,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-13 12:07:58,198 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 252 flow. Second operand 3 states and 145 transitions. [2024-10-13 12:07:58,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 354 flow [2024-10-13 12:07:58,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 346 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 12:07:58,205 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 248 flow [2024-10-13 12:07:58,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2024-10-13 12:07:58,206 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2024-10-13 12:07:58,206 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 248 flow [2024-10-13 12:07:58,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2024-10-13 12:07:58,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:07:58,207 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:07:58,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 12:07:58,207 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:07:58,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:07:58,208 INFO L85 PathProgramCache]: Analyzing trace with hash -994222136, now seen corresponding path program 1 times [2024-10-13 12:07:58,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:07:58,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651011310] [2024-10-13 12:07:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:07:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:07:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:07:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:07:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:07:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651011310] [2024-10-13 12:07:58,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651011310] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:07:58,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:07:58,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:07:58,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028846933] [2024-10-13 12:07:58,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:07:58,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:07:58,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:07:58,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:07:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:07:58,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-10-13 12:07:58,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 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) [2024-10-13 12:07:58,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:07:58,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-10-13 12:07:58,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:07:59,634 INFO L124 PetriNetUnfolderBase]: 7410/13329 cut-off events. [2024-10-13 12:07:59,635 INFO L125 PetriNetUnfolderBase]: For 2811/2811 co-relation queries the response was YES. [2024-10-13 12:07:59,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27570 conditions, 13329 events. 7410/13329 cut-off events. For 2811/2811 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 121675 event pairs, 1446 based on Foata normal form. 0/12087 useless extension candidates. Maximal degree in co-relation 27558. Up to 5622 conditions per place. [2024-10-13 12:07:59,937 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 65 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-10-13 12:07:59,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 516 flow [2024-10-13 12:07:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:07:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:07:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2024-10-13 12:07:59,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-10-13 12:07:59,939 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 248 flow. Second operand 5 states and 244 transitions. [2024-10-13 12:07:59,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 516 flow [2024-10-13 12:08:00,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 506 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:08:00,107 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 343 flow [2024-10-13 12:08:00,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-10-13 12:08:00,108 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2024-10-13 12:08:00,108 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 343 flow [2024-10-13 12:08:00,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 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) [2024-10-13 12:08:00,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:00,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:00,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 12:08:00,109 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:00,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2002050778, now seen corresponding path program 1 times [2024-10-13 12:08:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:00,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573428390] [2024-10-13 12:08:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:00,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:00,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573428390] [2024-10-13 12:08:00,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573428390] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:08:00,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869494895] [2024-10-13 12:08:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:00,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:00,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:00,296 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) [2024-10-13 12:08:00,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:08:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:00,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 12:08:00,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:08:00,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:08:00,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-10-13 12:08:00,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-13 12:08:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:00,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:08:00,523 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 12:08:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:00,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869494895] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:08:00,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:08:00,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 11 [2024-10-13 12:08:00,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957498403] [2024-10-13 12:08:00,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:08:00,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:08:00,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:08:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-13 12:08:00,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 80 [2024-10-13 12:08:00,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 343 flow. Second operand has 13 states, 13 states have (on average 35.84615384615385) internal successors, (466), 13 states have internal predecessors, (466), 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) [2024-10-13 12:08:00,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:00,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 80 [2024-10-13 12:08:00,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:02,082 INFO L124 PetriNetUnfolderBase]: 5864/11634 cut-off events. [2024-10-13 12:08:02,083 INFO L125 PetriNetUnfolderBase]: For 3647/3647 co-relation queries the response was YES. [2024-10-13 12:08:02,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27258 conditions, 11634 events. 5864/11634 cut-off events. For 3647/3647 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 113435 event pairs, 3861 based on Foata normal form. 4/10824 useless extension candidates. Maximal degree in co-relation 27243. Up to 3919 conditions per place. [2024-10-13 12:08:02,150 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 98 selfloop transitions, 16 changer transitions 0/145 dead transitions. [2024-10-13 12:08:02,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 145 transitions, 809 flow [2024-10-13 12:08:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 12:08:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 12:08:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 403 transitions. [2024-10-13 12:08:02,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5597222222222222 [2024-10-13 12:08:02,152 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 343 flow. Second operand 9 states and 403 transitions. [2024-10-13 12:08:02,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 145 transitions, 809 flow [2024-10-13 12:08:02,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 145 transitions, 802 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:08:02,160 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 423 flow [2024-10-13 12:08:02,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=423, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2024-10-13 12:08:02,161 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 18 predicate places. [2024-10-13 12:08:02,161 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 423 flow [2024-10-13 12:08:02,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 35.84615384615385) internal successors, (466), 13 states have internal predecessors, (466), 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) [2024-10-13 12:08:02,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:02,161 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:02,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 12:08:02,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 12:08:02,366 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:02,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:02,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1964725272, now seen corresponding path program 1 times [2024-10-13 12:08:02,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:02,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908981458] [2024-10-13 12:08:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:02,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:02,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:02,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908981458] [2024-10-13 12:08:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908981458] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:02,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:02,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:08:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34053897] [2024-10-13 12:08:02,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:02,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:08:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:08:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:08:02,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2024-10-13 12:08:02,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 423 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2024-10-13 12:08:02,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:02,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2024-10-13 12:08:02,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:03,699 INFO L124 PetriNetUnfolderBase]: 4679/10161 cut-off events. [2024-10-13 12:08:03,699 INFO L125 PetriNetUnfolderBase]: For 5430/5430 co-relation queries the response was YES. [2024-10-13 12:08:03,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24269 conditions, 10161 events. 4679/10161 cut-off events. For 5430/5430 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 100855 event pairs, 3262 based on Foata normal form. 0/9772 useless extension candidates. Maximal degree in co-relation 24252. Up to 5414 conditions per place. [2024-10-13 12:08:03,822 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 51 selfloop transitions, 5 changer transitions 1/94 dead transitions. [2024-10-13 12:08:03,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 94 transitions, 547 flow [2024-10-13 12:08:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:08:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:08:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-10-13 12:08:03,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-10-13 12:08:03,824 INFO L175 Difference]: Start difference. First operand has 93 places, 89 transitions, 423 flow. Second operand 4 states and 188 transitions. [2024-10-13 12:08:03,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 94 transitions, 547 flow [2024-10-13 12:08:03,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 533 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-13 12:08:03,853 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 411 flow [2024-10-13 12:08:03,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=411, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2024-10-13 12:08:03,854 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 18 predicate places. [2024-10-13 12:08:03,854 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 411 flow [2024-10-13 12:08:03,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2024-10-13 12:08:03,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:03,858 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:03,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 12:08:03,859 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:03,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash -818766701, now seen corresponding path program 1 times [2024-10-13 12:08:03,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:03,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828676043] [2024-10-13 12:08:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:03,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:04,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828676043] [2024-10-13 12:08:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828676043] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:08:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263740036] [2024-10-13 12:08:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:04,075 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) [2024-10-13 12:08:04,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:08:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:04,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 12:08:04,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:08:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:08:04,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2024-10-13 12:08:04,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-13 12:08:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:04,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:08:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:04,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263740036] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:08:04,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:08:04,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-10-13 12:08:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211279362] [2024-10-13 12:08:04,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:08:04,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:08:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:08:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:08:04,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-10-13 12:08:04,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 411 flow. Second operand has 14 states, 14 states have (on average 34.714285714285715) internal successors, (486), 14 states have internal predecessors, (486), 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) [2024-10-13 12:08:04,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:04,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-10-13 12:08:04,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:06,036 INFO L124 PetriNetUnfolderBase]: 5885/11133 cut-off events. [2024-10-13 12:08:06,037 INFO L125 PetriNetUnfolderBase]: For 5474/5474 co-relation queries the response was YES. [2024-10-13 12:08:06,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27781 conditions, 11133 events. 5885/11133 cut-off events. For 5474/5474 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 103519 event pairs, 1901 based on Foata normal form. 368/11118 useless extension candidates. Maximal degree in co-relation 27763. Up to 3259 conditions per place. [2024-10-13 12:08:06,236 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 84 selfloop transitions, 27 changer transitions 1/141 dead transitions. [2024-10-13 12:08:06,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 833 flow [2024-10-13 12:08:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 12:08:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 12:08:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 335 transitions. [2024-10-13 12:08:06,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-10-13 12:08:06,239 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 411 flow. Second operand 7 states and 335 transitions. [2024-10-13 12:08:06,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 833 flow [2024-10-13 12:08:06,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 815 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-13 12:08:06,282 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 475 flow [2024-10-13 12:08:06,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=475, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2024-10-13 12:08:06,282 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 19 predicate places. [2024-10-13 12:08:06,283 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 475 flow [2024-10-13 12:08:06,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.714285714285715) internal successors, (486), 14 states have internal predecessors, (486), 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) [2024-10-13 12:08:06,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:06,283 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:06,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 12:08:06,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:06,488 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:06,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1690652247, now seen corresponding path program 1 times [2024-10-13 12:08:06,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:06,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213731229] [2024-10-13 12:08:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:06,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:06,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213731229] [2024-10-13 12:08:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213731229] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:08:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141790162] [2024-10-13 12:08:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:06,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:06,680 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) [2024-10-13 12:08:06,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:08:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:06,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:08:06,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:08:06,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-13 12:08:06,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:08:06,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 12:08:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:07,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:08:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141790162] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:08:07,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:08:07,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-10-13 12:08:07,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952118233] [2024-10-13 12:08:07,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:08:07,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 12:08:07,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:07,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 12:08:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-10-13 12:08:07,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 80 [2024-10-13 12:08:07,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 475 flow. Second operand has 16 states, 16 states have (on average 34.6875) internal successors, (555), 16 states have internal predecessors, (555), 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) [2024-10-13 12:08:07,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:07,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 80 [2024-10-13 12:08:07,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:08,862 INFO L124 PetriNetUnfolderBase]: 6951/12139 cut-off events. [2024-10-13 12:08:08,863 INFO L125 PetriNetUnfolderBase]: For 6625/6625 co-relation queries the response was YES. [2024-10-13 12:08:08,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31650 conditions, 12139 events. 6951/12139 cut-off events. For 6625/6625 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 109066 event pairs, 548 based on Foata normal form. 355/12203 useless extension candidates. Maximal degree in co-relation 31632. Up to 4060 conditions per place. [2024-10-13 12:08:08,919 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 76 selfloop transitions, 26 changer transitions 13/146 dead transitions. [2024-10-13 12:08:08,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 895 flow [2024-10-13 12:08:08,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 12:08:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 12:08:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 401 transitions. [2024-10-13 12:08:08,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5569444444444445 [2024-10-13 12:08:08,924 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 475 flow. Second operand 9 states and 401 transitions. [2024-10-13 12:08:08,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 895 flow [2024-10-13 12:08:08,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 146 transitions, 849 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-10-13 12:08:08,942 INFO L231 Difference]: Finished difference. Result has 98 places, 89 transitions, 490 flow [2024-10-13 12:08:08,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=98, PETRI_TRANSITIONS=89} [2024-10-13 12:08:08,942 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 23 predicate places. [2024-10-13 12:08:08,942 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 89 transitions, 490 flow [2024-10-13 12:08:08,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 34.6875) internal successors, (555), 16 states have internal predecessors, (555), 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) [2024-10-13 12:08:08,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:08,943 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:08,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 12:08:09,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 12:08:09,148 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:09,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -743323899, now seen corresponding path program 1 times [2024-10-13 12:08:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:09,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47700859] [2024-10-13 12:08:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:09,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47700859] [2024-10-13 12:08:09,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47700859] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:08:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785213444] [2024-10-13 12:08:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:09,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:09,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:09,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:08:09,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 12:08:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:09,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 12:08:09,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:08:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:09,304 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:08:09,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785213444] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:09,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:08:09,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-10-13 12:08:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306140452] [2024-10-13 12:08:09,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:09,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:08:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:08:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:08:09,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 80 [2024-10-13 12:08:09,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 89 transitions, 490 flow. Second operand has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 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) [2024-10-13 12:08:09,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:09,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 80 [2024-10-13 12:08:09,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:10,271 INFO L124 PetriNetUnfolderBase]: 5657/10791 cut-off events. [2024-10-13 12:08:10,272 INFO L125 PetriNetUnfolderBase]: For 9363/9363 co-relation queries the response was YES. [2024-10-13 12:08:10,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 10791 events. 5657/10791 cut-off events. For 9363/9363 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 102027 event pairs, 3376 based on Foata normal form. 48/10472 useless extension candidates. Maximal degree in co-relation 29323. Up to 4620 conditions per place. [2024-10-13 12:08:10,456 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 109 selfloop transitions, 19 changer transitions 0/159 dead transitions. [2024-10-13 12:08:10,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 1070 flow [2024-10-13 12:08:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:08:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:08:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 335 transitions. [2024-10-13 12:08:10,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6979166666666666 [2024-10-13 12:08:10,458 INFO L175 Difference]: Start difference. First operand has 98 places, 89 transitions, 490 flow. Second operand 6 states and 335 transitions. [2024-10-13 12:08:10,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 1070 flow [2024-10-13 12:08:10,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 159 transitions, 971 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-10-13 12:08:10,485 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 573 flow [2024-10-13 12:08:10,486 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-10-13 12:08:10,487 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 25 predicate places. [2024-10-13 12:08:10,487 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 573 flow [2024-10-13 12:08:10,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 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) [2024-10-13 12:08:10,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:10,487 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:10,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 12:08:10,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:10,692 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:10,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:10,693 INFO L85 PathProgramCache]: Analyzing trace with hash 592633522, now seen corresponding path program 1 times [2024-10-13 12:08:10,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:10,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578526660] [2024-10-13 12:08:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:10,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:10,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:10,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578526660] [2024-10-13 12:08:10,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578526660] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:10,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:08:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450601143] [2024-10-13 12:08:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:10,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:08:10,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:08:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:08:10,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 80 [2024-10-13 12:08:10,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 573 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-10-13 12:08:10,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:10,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 80 [2024-10-13 12:08:10,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:17,092 INFO L124 PetriNetUnfolderBase]: 47550/76295 cut-off events. [2024-10-13 12:08:17,092 INFO L125 PetriNetUnfolderBase]: For 97190/97190 co-relation queries the response was YES. [2024-10-13 12:08:17,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196584 conditions, 76295 events. 47550/76295 cut-off events. For 97190/97190 co-relation queries the response was YES. Maximal size of possible extension queue 4220. Compared 714265 event pairs, 15780 based on Foata normal form. 0/74475 useless extension candidates. Maximal degree in co-relation 196566. Up to 41834 conditions per place. [2024-10-13 12:08:17,977 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 266 selfloop transitions, 14 changer transitions 25/332 dead transitions. [2024-10-13 12:08:17,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 332 transitions, 2785 flow [2024-10-13 12:08:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:08:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:08:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 413 transitions. [2024-10-13 12:08:17,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6453125 [2024-10-13 12:08:17,979 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 573 flow. Second operand 8 states and 413 transitions. [2024-10-13 12:08:17,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 332 transitions, 2785 flow [2024-10-13 12:08:18,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 332 transitions, 2775 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 12:08:18,291 INFO L231 Difference]: Finished difference. Result has 112 places, 112 transitions, 674 flow [2024-10-13 12:08:18,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=674, PETRI_PLACES=112, PETRI_TRANSITIONS=112} [2024-10-13 12:08:18,292 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 37 predicate places. [2024-10-13 12:08:18,292 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 112 transitions, 674 flow [2024-10-13 12:08:18,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-10-13 12:08:18,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:18,292 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:18,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-13 12:08:18,292 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:18,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 664758200, now seen corresponding path program 1 times [2024-10-13 12:08:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:18,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870902245] [2024-10-13 12:08:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:08:18,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:08:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:08:18,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:08:18,346 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:08:18,346 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (14 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (13 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (12 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-10-13 12:08:18,347 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2024-10-13 12:08:18,348 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-10-13 12:08:18,348 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-10-13 12:08:18,348 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-10-13 12:08:18,348 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2024-10-13 12:08:18,348 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 16 remaining) [2024-10-13 12:08:18,353 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-10-13 12:08:18,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-13 12:08:18,353 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:18,354 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:08:18,354 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:08:18,393 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2024-10-13 12:08:18,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 101 transitions, 274 flow [2024-10-13 12:08:18,547 INFO L124 PetriNetUnfolderBase]: 362/1567 cut-off events. [2024-10-13 12:08:18,547 INFO L125 PetriNetUnfolderBase]: For 419/435 co-relation queries the response was YES. [2024-10-13 12:08:18,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1567 events. 362/1567 cut-off events. For 419/435 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 11709 event pairs, 32 based on Foata normal form. 0/1019 useless extension candidates. Maximal degree in co-relation 1009. Up to 192 conditions per place. [2024-10-13 12:08:18,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 101 transitions, 274 flow [2024-10-13 12:08:18,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 101 transitions, 274 flow [2024-10-13 12:08:18,568 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:08:18,568 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;@5a499189, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:08:18,568 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-10-13 12:08:18,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:08:18,570 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:08:18,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:08:18,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:18,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:08:18,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-13 12:08:18,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash 17345146, now seen corresponding path program 1 times [2024-10-13 12:08:18,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:18,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773821611] [2024-10-13 12:08:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:18,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:18,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773821611] [2024-10-13 12:08:18,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773821611] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:18,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:18,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:08:18,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720809631] [2024-10-13 12:08:18,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:18,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:08:18,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:08:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:08:18,583 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 101 [2024-10-13 12:08:18,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2024-10-13 12:08:18,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:18,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 101 [2024-10-13 12:08:18,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:24,161 INFO L124 PetriNetUnfolderBase]: 34066/64837 cut-off events. [2024-10-13 12:08:24,162 INFO L125 PetriNetUnfolderBase]: For 20374/20374 co-relation queries the response was YES. [2024-10-13 12:08:24,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117455 conditions, 64837 events. 34066/64837 cut-off events. For 20374/20374 co-relation queries the response was YES. Maximal size of possible extension queue 2942. Compared 714379 event pairs, 29642 based on Foata normal form. 17554/71783 useless extension candidates. Maximal degree in co-relation 37009. Up to 45834 conditions per place. [2024-10-13 12:08:24,638 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 42 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2024-10-13 12:08:24,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 334 flow [2024-10-13 12:08:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:08:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:08:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 145 transitions. [2024-10-13 12:08:24,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7178217821782178 [2024-10-13 12:08:24,640 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 274 flow. Second operand 2 states and 145 transitions. [2024-10-13 12:08:24,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 334 flow [2024-10-13 12:08:24,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:08:24,645 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 250 flow [2024-10-13 12:08:24,645 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=250, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2024-10-13 12:08:24,646 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -4 predicate places. [2024-10-13 12:08:24,646 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 250 flow [2024-10-13 12:08:24,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2024-10-13 12:08:24,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:24,646 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:08:24,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-13 12:08:24,646 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-13 12:08:24,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash 537698977, now seen corresponding path program 1 times [2024-10-13 12:08:24,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:24,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809951609] [2024-10-13 12:08:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:24,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:24,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809951609] [2024-10-13 12:08:24,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809951609] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:24,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:24,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:08:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180763346] [2024-10-13 12:08:24,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:24,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:08:24,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:24,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:08:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:08:24,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 101 [2024-10-13 12:08:24,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2024-10-13 12:08:24,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:24,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 101 [2024-10-13 12:08:24,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:30,161 INFO L124 PetriNetUnfolderBase]: 38403/67431 cut-off events. [2024-10-13 12:08:30,161 INFO L125 PetriNetUnfolderBase]: For 14309/14309 co-relation queries the response was YES. [2024-10-13 12:08:30,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126130 conditions, 67431 events. 38403/67431 cut-off events. For 14309/14309 co-relation queries the response was YES. Maximal size of possible extension queue 3148. Compared 694389 event pairs, 25339 based on Foata normal form. 0/60302 useless extension candidates. Maximal degree in co-relation 126121. Up to 39814 conditions per place. [2024-10-13 12:08:30,654 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 51 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-10-13 12:08:30,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 96 transitions, 370 flow [2024-10-13 12:08:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:08:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:08:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2024-10-13 12:08:30,656 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6072607260726073 [2024-10-13 12:08:30,656 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 250 flow. Second operand 3 states and 184 transitions. [2024-10-13 12:08:30,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 96 transitions, 370 flow [2024-10-13 12:08:30,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:08:30,668 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 250 flow [2024-10-13 12:08:30,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-10-13 12:08:30,669 INFO L277 CegarLoopForPetriNet]: 94 programPoint places, -4 predicate places. [2024-10-13 12:08:30,669 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 250 flow [2024-10-13 12:08:30,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2024-10-13 12:08:30,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:30,670 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:08:30,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-13 12:08:30,670 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-13 12:08:30,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:30,671 INFO L85 PathProgramCache]: Analyzing trace with hash 537698978, now seen corresponding path program 1 times [2024-10-13 12:08:30,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:30,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103407104] [2024-10-13 12:08:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:30,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:30,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103407104] [2024-10-13 12:08:30,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103407104] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:30,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:30,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:08:30,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626803725] [2024-10-13 12:08:30,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:30,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:08:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:08:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:08:30,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 101 [2024-10-13 12:08:30,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 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) [2024-10-13 12:08:30,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:30,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 101 [2024-10-13 12:08:30,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand