./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/unroll-4.wvr.c -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 bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:42:41,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:42:41,418 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:42:41,424 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:42:41,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:42:41,451 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:42:41,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:42:41,452 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:42:41,453 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:42:41,456 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:42:41,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:42:41,456 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:42:41,457 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:42:41,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:42:41,457 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:42:41,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:42:41,458 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:42:41,460 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:42:41,460 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:42:41,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:42:41,460 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:42:41,461 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:42:41,461 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:42:41,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:42:41,461 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:42:41,462 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:42:41,462 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:42:41,462 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:42:41,462 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:42:41,462 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:42:41,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:42:41,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:42:41,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:42:41,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:42:41,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:42:41,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:42:41,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:42:41,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:42:41,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:42:41,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:42:41,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:42:41,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:42:41,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2024-11-17 03:42:41,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:42:41,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:42:41,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:42:41,716 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:42:41,717 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:42:41,718 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-17 03:42:43,057 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:42:43,189 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:42:43,189 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-17 03:42:43,199 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5268e980c/f99a3a81b3ec4409919a47ccc5311153/FLAG5b4c3b8be [2024-11-17 03:42:43,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5268e980c/f99a3a81b3ec4409919a47ccc5311153 [2024-11-17 03:42:43,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:42:43,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:42:43,218 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:42:43,218 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:42:43,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:42:43,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553e05a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43, skipping insertion in model container [2024-11-17 03:42:43,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,259 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:42:43,536 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:42:43,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:42:43,546 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:42:43,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:42:43,580 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:42:43,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43 WrapperNode [2024-11-17 03:42:43,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:42:43,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:42:43,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:42:43,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:42:43,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,593 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,611 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 146 [2024-11-17 03:42:43,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:42:43,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:42:43,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:42:43,612 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:42:43,630 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,637 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,661 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 03:42:43,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,673 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:42:43,689 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:42:43,693 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:42:43,693 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:42:43,694 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (1/1) ... [2024-11-17 03:42:43,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:42:43,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:43,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:42:43,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:42:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:42:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:42:43,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:42:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:42:43,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:42:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:42:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:42:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:42:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:42:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:42:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:42:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:42:43,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:42:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:42:43,777 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:42:43,874 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:42:43,876 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:42:44,096 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:42:44,097 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:42:44,353 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:42:44,354 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:42:44,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:42:44 BoogieIcfgContainer [2024-11-17 03:42:44,354 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:42:44,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:42:44,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:42:44,361 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:42:44,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:42:43" (1/3) ... [2024-11-17 03:42:44,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301625f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:42:44, skipping insertion in model container [2024-11-17 03:42:44,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:43" (2/3) ... [2024-11-17 03:42:44,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301625f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:42:44, skipping insertion in model container [2024-11-17 03:42:44,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:42:44" (3/3) ... [2024-11-17 03:42:44,365 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2024-11-17 03:42:44,379 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:42:44,379 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-17 03:42:44,379 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:42:44,426 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:42:44,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 49 transitions, 112 flow [2024-11-17 03:42:44,484 INFO L124 PetriNetUnfolderBase]: 6/47 cut-off events. [2024-11-17 03:42:44,485 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:42:44,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 6/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-11-17 03:42:44,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 49 transitions, 112 flow [2024-11-17 03:42:44,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 104 flow [2024-11-17 03:42:44,500 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:42:44,506 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;@794df38a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:42:44,507 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-17 03:42:44,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:42:44,515 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:42:44,515 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:42:44,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:44,516 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:42:44,516 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:44,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash 13349827, now seen corresponding path program 1 times [2024-11-17 03:42:44,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:44,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857378557] [2024-11-17 03:42:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:44,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857378557] [2024-11-17 03:42:44,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857378557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:44,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:44,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:42:44,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859143983] [2024-11-17 03:42:44,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:44,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:42:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:42:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:42:44,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-17 03:42:44,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:44,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:44,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-17 03:42:44,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:44,870 INFO L124 PetriNetUnfolderBase]: 101/255 cut-off events. [2024-11-17 03:42:44,870 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-17 03:42:44,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 255 events. 101/255 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1215 event pairs, 75 based on Foata normal form. 27/238 useless extension candidates. Maximal degree in co-relation 392. Up to 175 conditions per place. [2024-11-17 03:42:44,874 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 20 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-17 03:42:44,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 136 flow [2024-11-17 03:42:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-17 03:42:44,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-11-17 03:42:44,884 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 104 flow. Second operand 3 states and 90 transitions. [2024-11-17 03:42:44,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 136 flow [2024-11-17 03:42:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:42:44,887 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 88 flow [2024-11-17 03:42:44,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-17 03:42:44,891 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2024-11-17 03:42:44,891 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 88 flow [2024-11-17 03:42:44,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:44,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:44,892 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:42:44,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:42:44,892 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:44,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash 13349828, now seen corresponding path program 1 times [2024-11-17 03:42:44,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:44,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694574061] [2024-11-17 03:42:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:44,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:45,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:45,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694574061] [2024-11-17 03:42:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694574061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:45,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:45,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:45,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86599290] [2024-11-17 03:42:45,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:45,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:45,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:45,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:42:45,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-17 03:42:45,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:45,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:45,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-17 03:42:45,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:45,190 INFO L124 PetriNetUnfolderBase]: 102/260 cut-off events. [2024-11-17 03:42:45,192 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-17 03:42:45,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 260 events. 102/260 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1229 event pairs, 75 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 426. Up to 180 conditions per place. [2024-11-17 03:42:45,194 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 23 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-11-17 03:42:45,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 148 flow [2024-11-17 03:42:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-17 03:42:45,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-11-17 03:42:45,196 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 88 flow. Second operand 3 states and 90 transitions. [2024-11-17 03:42:45,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 148 flow [2024-11-17 03:42:45,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:45,198 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 103 flow [2024-11-17 03:42:45,198 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2024-11-17 03:42:45,199 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2024-11-17 03:42:45,199 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 103 flow [2024-11-17 03:42:45,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:45,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:45,200 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:42:45,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:42:45,201 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:45,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1726782255, now seen corresponding path program 1 times [2024-11-17 03:42:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:45,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011410250] [2024-11-17 03:42:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:45,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:45,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011410250] [2024-11-17 03:42:45,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011410250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:45,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991244376] [2024-11-17 03:42:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:45,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:45,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:45,428 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) [2024-11-17 03:42:45,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:42:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:45,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:42:45,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:45,572 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 8 treesize of output 1 [2024-11-17 03:42:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:45,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:45,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991244376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:45,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:45,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:42:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687841470] [2024-11-17 03:42:45,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:45,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:42:45,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:42:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:42:45,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:42:45,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 103 flow. Second operand has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:45,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:45,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:42:45,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:46,223 INFO L124 PetriNetUnfolderBase]: 103/264 cut-off events. [2024-11-17 03:42:46,224 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:42:46,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 264 events. 103/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1265 event pairs, 75 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 426. Up to 177 conditions per place. [2024-11-17 03:42:46,226 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 22 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2024-11-17 03:42:46,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 177 flow [2024-11-17 03:42:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:42:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:42:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-11-17 03:42:46,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-11-17 03:42:46,228 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 103 flow. Second operand 7 states and 173 transitions. [2024-11-17 03:42:46,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 177 flow [2024-11-17 03:42:46,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:42:46,229 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 128 flow [2024-11-17 03:42:46,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=128, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-17 03:42:46,232 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2024-11-17 03:42:46,232 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 128 flow [2024-11-17 03:42:46,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:46,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:46,233 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:46,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:42:46,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:46,438 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:46,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1317063644, now seen corresponding path program 1 times [2024-11-17 03:42:46,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:46,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097716477] [2024-11-17 03:42:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:46,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:46,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:46,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097716477] [2024-11-17 03:42:46,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097716477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:46,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:46,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:46,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195064127] [2024-11-17 03:42:46,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:46,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:46,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:46,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:42:46,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-17 03:42:46,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:46,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:46,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-17 03:42:46,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:46,563 INFO L124 PetriNetUnfolderBase]: 103/233 cut-off events. [2024-11-17 03:42:46,563 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-17 03:42:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 233 events. 103/233 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 964 event pairs, 75 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 395. Up to 176 conditions per place. [2024-11-17 03:42:46,565 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 24 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-17 03:42:46,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 174 flow [2024-11-17 03:42:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-17 03:42:46,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-17 03:42:46,566 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 128 flow. Second operand 4 states and 91 transitions. [2024-11-17 03:42:46,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 174 flow [2024-11-17 03:42:46,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 156 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-17 03:42:46,567 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 108 flow [2024-11-17 03:42:46,567 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-17 03:42:46,568 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2024-11-17 03:42:46,568 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 108 flow [2024-11-17 03:42:46,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:46,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:46,568 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:46,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:42:46,568 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:46,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1317063645, now seen corresponding path program 1 times [2024-11-17 03:42:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:46,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070354923] [2024-11-17 03:42:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:46,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:46,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070354923] [2024-11-17 03:42:46,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070354923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:46,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:46,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:46,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200347349] [2024-11-17 03:42:46,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:46,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:42:46,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:42:46,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:42:46,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-17 03:42:46,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:46,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:46,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-17 03:42:46,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:46,704 INFO L124 PetriNetUnfolderBase]: 102/231 cut-off events. [2024-11-17 03:42:46,704 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:42:46,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 231 events. 102/231 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 940 event pairs, 75 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 395. Up to 183 conditions per place. [2024-11-17 03:42:46,706 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 26 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-11-17 03:42:46,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 159 flow [2024-11-17 03:42:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-17 03:42:46,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-11-17 03:42:46,709 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 108 flow. Second operand 3 states and 89 transitions. [2024-11-17 03:42:46,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 159 flow [2024-11-17 03:42:46,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 155 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:46,710 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 107 flow [2024-11-17 03:42:46,710 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-17 03:42:46,711 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2024-11-17 03:42:46,711 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 107 flow [2024-11-17 03:42:46,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:46,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:46,711 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:46,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:42:46,714 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:46,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:46,714 INFO L85 PathProgramCache]: Analyzing trace with hash -359744784, now seen corresponding path program 1 times [2024-11-17 03:42:46,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:46,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114674577] [2024-11-17 03:42:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:46,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:46,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114674577] [2024-11-17 03:42:46,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114674577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990256919] [2024-11-17 03:42:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:46,855 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) [2024-11-17 03:42:46,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:42:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:46,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:42:46,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:46,915 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 8 treesize of output 1 [2024-11-17 03:42:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:47,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:47,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990256919] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:47,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:42:47,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2024-11-17 03:42:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758508230] [2024-11-17 03:42:47,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:47,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:47,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:42:47,150 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-17 03:42:47,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:47,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:47,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-17 03:42:47,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:47,226 INFO L124 PetriNetUnfolderBase]: 201/434 cut-off events. [2024-11-17 03:42:47,227 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:42:47,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 434 events. 201/434 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2137 event pairs, 75 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 798. Up to 189 conditions per place. [2024-11-17 03:42:47,229 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 40 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-11-17 03:42:47,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 230 flow [2024-11-17 03:42:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-11-17 03:42:47,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-11-17 03:42:47,232 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 107 flow. Second operand 4 states and 124 transitions. [2024-11-17 03:42:47,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 230 flow [2024-11-17 03:42:47,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:47,234 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 120 flow [2024-11-17 03:42:47,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-17 03:42:47,234 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2024-11-17 03:42:47,235 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 120 flow [2024-11-17 03:42:47,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:47,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:47,235 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:47,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:42:47,439 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,SelfDestructingSolverStorable5 [2024-11-17 03:42:47,440 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:47,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1172065200, now seen corresponding path program 1 times [2024-11-17 03:42:47,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:47,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041008215] [2024-11-17 03:42:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:47,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041008215] [2024-11-17 03:42:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041008215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065677938] [2024-11-17 03:42:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:47,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:47,559 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) [2024-11-17 03:42:47,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:42:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:47,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:42:47,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:47,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:47,761 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 29 treesize of output 25 [2024-11-17 03:42:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065677938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:47,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:47,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:42:47,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97333402] [2024-11-17 03:42:47,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:47,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:42:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:42:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:42:47,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-17 03:42:47,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 120 flow. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:47,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:47,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-17 03:42:47,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:48,056 INFO L124 PetriNetUnfolderBase]: 339/675 cut-off events. [2024-11-17 03:42:48,056 INFO L125 PetriNetUnfolderBase]: For 83/101 co-relation queries the response was YES. [2024-11-17 03:42:48,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 675 events. 339/675 cut-off events. For 83/101 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3420 event pairs, 81 based on Foata normal form. 0/596 useless extension candidates. Maximal degree in co-relation 1356. Up to 411 conditions per place. [2024-11-17 03:42:48,059 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 39 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-11-17 03:42:48,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 239 flow [2024-11-17 03:42:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-11-17 03:42:48,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-11-17 03:42:48,060 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 120 flow. Second operand 5 states and 130 transitions. [2024-11-17 03:42:48,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 239 flow [2024-11-17 03:42:48,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:48,062 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 134 flow [2024-11-17 03:42:48,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-17 03:42:48,063 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2024-11-17 03:42:48,063 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 134 flow [2024-11-17 03:42:48,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:48,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:48,063 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:48,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:42:48,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:48,268 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:48,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1974283312, now seen corresponding path program 1 times [2024-11-17 03:42:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:48,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131972379] [2024-11-17 03:42:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:48,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:48,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:48,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131972379] [2024-11-17 03:42:48,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131972379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:48,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149697641] [2024-11-17 03:42:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:48,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:48,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:48,468 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) [2024-11-17 03:42:48,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:42:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:48,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:42:48,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:48,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:48,678 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 29 treesize of output 25 [2024-11-17 03:42:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:48,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149697641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:48,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:48,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-17 03:42:48,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963302132] [2024-11-17 03:42:48,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:48,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:42:48,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:48,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:42:48,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:42:49,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-11-17 03:42:49,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 134 flow. Second operand has 17 states, 17 states have (on average 19.11764705882353) internal successors, (325), 17 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:49,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:49,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-11-17 03:42:49,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:49,679 INFO L124 PetriNetUnfolderBase]: 422/857 cut-off events. [2024-11-17 03:42:49,679 INFO L125 PetriNetUnfolderBase]: For 95/117 co-relation queries the response was YES. [2024-11-17 03:42:49,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1813 conditions, 857 events. 422/857 cut-off events. For 95/117 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4762 event pairs, 120 based on Foata normal form. 0/836 useless extension candidates. Maximal degree in co-relation 1039. Up to 233 conditions per place. [2024-11-17 03:42:49,683 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 52 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-11-17 03:42:49,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 343 flow [2024-11-17 03:42:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:42:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:42:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-11-17 03:42:49,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-11-17 03:42:49,685 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 134 flow. Second operand 11 states and 253 transitions. [2024-11-17 03:42:49,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 343 flow [2024-11-17 03:42:49,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 335 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:42:49,686 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 154 flow [2024-11-17 03:42:49,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=154, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-11-17 03:42:49,687 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2024-11-17 03:42:49,687 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 154 flow [2024-11-17 03:42:49,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.11764705882353) internal successors, (325), 17 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:49,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:49,688 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:49,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:42:49,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:49,889 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:49,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:49,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1212998751, now seen corresponding path program 1 times [2024-11-17 03:42:49,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:49,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812044702] [2024-11-17 03:42:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:49,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:50,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:50,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812044702] [2024-11-17 03:42:50,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812044702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:50,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692761729] [2024-11-17 03:42:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:50,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:50,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:50,042 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) [2024-11-17 03:42:50,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:42:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:50,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:42:50,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:50,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:50,299 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 36 treesize of output 32 [2024-11-17 03:42:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:50,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692761729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:50,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:50,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-17 03:42:50,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251560780] [2024-11-17 03:42:50,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:50,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:42:50,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:50,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:42:50,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:42:51,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:42:51,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 154 flow. Second operand has 19 states, 19 states have (on average 21.736842105263158) internal successors, (413), 19 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:51,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:51,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:42:51,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:51,617 INFO L124 PetriNetUnfolderBase]: 560/1123 cut-off events. [2024-11-17 03:42:51,617 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2024-11-17 03:42:51,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2431 conditions, 1123 events. 560/1123 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6372 event pairs, 189 based on Foata normal form. 0/1105 useless extension candidates. Maximal degree in co-relation 1346. Up to 320 conditions per place. [2024-11-17 03:42:51,622 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 86 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-11-17 03:42:51,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 551 flow [2024-11-17 03:42:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:42:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:42:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 353 transitions. [2024-11-17 03:42:51,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.554160125588697 [2024-11-17 03:42:51,623 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 154 flow. Second operand 13 states and 353 transitions. [2024-11-17 03:42:51,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 551 flow [2024-11-17 03:42:51,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 109 transitions, 540 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-17 03:42:51,626 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 196 flow [2024-11-17 03:42:51,626 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=196, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2024-11-17 03:42:51,627 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2024-11-17 03:42:51,627 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 196 flow [2024-11-17 03:42:51,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.736842105263158) internal successors, (413), 19 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:51,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:51,627 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:51,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:42:51,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:51,828 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:51,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1533496741, now seen corresponding path program 1 times [2024-11-17 03:42:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58749057] [2024-11-17 03:42:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:51,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:51,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58749057] [2024-11-17 03:42:51,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58749057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:51,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:51,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:51,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552754394] [2024-11-17 03:42:51,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:51,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:42:51,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:42:51,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:42:51,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-11-17 03:42:51,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:51,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:51,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-11-17 03:42:51,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:51,957 INFO L124 PetriNetUnfolderBase]: 560/1125 cut-off events. [2024-11-17 03:42:51,958 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-11-17 03:42:51,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2664 conditions, 1125 events. 560/1125 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6506 event pairs, 162 based on Foata normal form. 2/1094 useless extension candidates. Maximal degree in co-relation 1483. Up to 796 conditions per place. [2024-11-17 03:42:51,962 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 48 selfloop transitions, 4 changer transitions 1/61 dead transitions. [2024-11-17 03:42:51,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 357 flow [2024-11-17 03:42:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-11-17 03:42:51,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6938775510204082 [2024-11-17 03:42:51,963 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 196 flow. Second operand 3 states and 102 transitions. [2024-11-17 03:42:51,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 357 flow [2024-11-17 03:42:51,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 331 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:42:51,965 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 208 flow [2024-11-17 03:42:51,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-11-17 03:42:51,966 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2024-11-17 03:42:51,966 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 208 flow [2024-11-17 03:42:51,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:51,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:51,966 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:51,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:42:51,967 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:51,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash 624507496, now seen corresponding path program 1 times [2024-11-17 03:42:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:51,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245378658] [2024-11-17 03:42:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:51,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:52,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:52,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245378658] [2024-11-17 03:42:52,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245378658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:52,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:52,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:52,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562503773] [2024-11-17 03:42:52,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:52,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:52,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:52,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:42:52,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:52,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:52,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:42:52,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:52,219 INFO L124 PetriNetUnfolderBase]: 986/1844 cut-off events. [2024-11-17 03:42:52,219 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2024-11-17 03:42:52,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4411 conditions, 1844 events. 986/1844 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10818 event pairs, 343 based on Foata normal form. 42/1866 useless extension candidates. Maximal degree in co-relation 2445. Up to 797 conditions per place. [2024-11-17 03:42:52,226 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 74 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-11-17 03:42:52,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 547 flow [2024-11-17 03:42:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-17 03:42:52,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6693877551020408 [2024-11-17 03:42:52,228 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 208 flow. Second operand 5 states and 164 transitions. [2024-11-17 03:42:52,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 547 flow [2024-11-17 03:42:52,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 538 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:42:52,230 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 308 flow [2024-11-17 03:42:52,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-11-17 03:42:52,231 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 15 predicate places. [2024-11-17 03:42:52,231 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 308 flow [2024-11-17 03:42:52,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:52,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:52,231 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:52,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:42:52,231 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:52,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1183659522, now seen corresponding path program 2 times [2024-11-17 03:42:52,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:52,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487467964] [2024-11-17 03:42:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:52,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:52,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:52,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487467964] [2024-11-17 03:42:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487467964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:52,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538688507] [2024-11-17 03:42:52,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:52,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:52,293 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:42:52,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:52,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:52,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:42:52,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:52,574 INFO L124 PetriNetUnfolderBase]: 1132/2179 cut-off events. [2024-11-17 03:42:52,574 INFO L125 PetriNetUnfolderBase]: For 2385/2385 co-relation queries the response was YES. [2024-11-17 03:42:52,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6010 conditions, 2179 events. 1132/2179 cut-off events. For 2385/2385 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 13451 event pairs, 538 based on Foata normal form. 28/2203 useless extension candidates. Maximal degree in co-relation 3248. Up to 1298 conditions per place. [2024-11-17 03:42:52,584 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 90 selfloop transitions, 14 changer transitions 3/113 dead transitions. [2024-11-17 03:42:52,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 113 transitions, 806 flow [2024-11-17 03:42:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:42:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:42:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-11-17 03:42:52,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-11-17 03:42:52,585 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 308 flow. Second operand 6 states and 187 transitions. [2024-11-17 03:42:52,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 113 transitions, 806 flow [2024-11-17 03:42:52,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 113 transitions, 778 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:52,591 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 427 flow [2024-11-17 03:42:52,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2024-11-17 03:42:52,593 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2024-11-17 03:42:52,593 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 427 flow [2024-11-17 03:42:52,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:52,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:52,594 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:52,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:42:52,594 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:52,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:52,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2111946968, now seen corresponding path program 3 times [2024-11-17 03:42:52,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:52,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183629225] [2024-11-17 03:42:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:52,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183629225] [2024-11-17 03:42:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183629225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952520293] [2024-11-17 03:42:52,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:42:52,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:52,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:52,701 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:42:52,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:42:52,764 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:42:52,764 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:52,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:52,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:52,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952520293] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:52,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:42:52,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-17 03:42:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448616185] [2024-11-17 03:42:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:52,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:42:52,823 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-17 03:42:52,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 427 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) [2024-11-17 03:42:52,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:52,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-17 03:42:52,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:53,027 INFO L124 PetriNetUnfolderBase]: 1042/2055 cut-off events. [2024-11-17 03:42:53,028 INFO L125 PetriNetUnfolderBase]: For 3352/3376 co-relation queries the response was YES. [2024-11-17 03:42:53,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6244 conditions, 2055 events. 1042/2055 cut-off events. For 3352/3376 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12988 event pairs, 248 based on Foata normal form. 18/2017 useless extension candidates. Maximal degree in co-relation 5351. Up to 1299 conditions per place. [2024-11-17 03:42:53,038 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 72 selfloop transitions, 17 changer transitions 2/99 dead transitions. [2024-11-17 03:42:53,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 816 flow [2024-11-17 03:42:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-17 03:42:53,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-11-17 03:42:53,039 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 427 flow. Second operand 4 states and 127 transitions. [2024-11-17 03:42:53,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 816 flow [2024-11-17 03:42:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 796 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:53,045 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 533 flow [2024-11-17 03:42:53,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=533, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-17 03:42:53,045 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 26 predicate places. [2024-11-17 03:42:53,045 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 533 flow [2024-11-17 03:42:53,045 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) [2024-11-17 03:42:53,046 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:53,046 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:53,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:42:53,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:53,246 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:53,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1477390444, now seen corresponding path program 4 times [2024-11-17 03:42:53,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:53,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506117370] [2024-11-17 03:42:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:53,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:53,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:53,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506117370] [2024-11-17 03:42:53,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506117370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:53,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:53,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:53,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604534595] [2024-11-17 03:42:53,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:53,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:53,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:53,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:53,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:42:53,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 533 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:53,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:53,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:42:53,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:53,549 INFO L124 PetriNetUnfolderBase]: 1035/1991 cut-off events. [2024-11-17 03:42:53,550 INFO L125 PetriNetUnfolderBase]: For 5377/5401 co-relation queries the response was YES. [2024-11-17 03:42:53,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6617 conditions, 1991 events. 1035/1991 cut-off events. For 5377/5401 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12227 event pairs, 352 based on Foata normal form. 52/2039 useless extension candidates. Maximal degree in co-relation 5619. Up to 865 conditions per place. [2024-11-17 03:42:53,559 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 88 selfloop transitions, 23 changer transitions 9/126 dead transitions. [2024-11-17 03:42:53,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 126 transitions, 1115 flow [2024-11-17 03:42:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:42:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:42:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-11-17 03:42:53,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-11-17 03:42:53,560 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 533 flow. Second operand 6 states and 190 transitions. [2024-11-17 03:42:53,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 126 transitions, 1115 flow [2024-11-17 03:42:53,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 126 transitions, 1095 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-11-17 03:42:53,567 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 706 flow [2024-11-17 03:42:53,567 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=706, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-11-17 03:42:53,568 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 35 predicate places. [2024-11-17 03:42:53,568 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 706 flow [2024-11-17 03:42:53,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:53,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:53,568 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:53,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:42:53,568 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:53,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash -793662064, now seen corresponding path program 5 times [2024-11-17 03:42:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:53,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465971517] [2024-11-17 03:42:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:53,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:53,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:53,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465971517] [2024-11-17 03:42:53,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465971517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:53,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719529047] [2024-11-17 03:42:53,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:42:53,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:53,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:42:53,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:42:53,705 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:42:53,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:53,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:53,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:53,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:53,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719529047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:53,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:53,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-11-17 03:42:53,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33984821] [2024-11-17 03:42:53,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:53,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:42:53,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:53,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:42:53,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:42:53,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:42:53,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:53,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:53,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:42:53,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:54,160 INFO L124 PetriNetUnfolderBase]: 1121/2120 cut-off events. [2024-11-17 03:42:54,160 INFO L125 PetriNetUnfolderBase]: For 6933/6941 co-relation queries the response was YES. [2024-11-17 03:42:54,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7747 conditions, 2120 events. 1121/2120 cut-off events. For 6933/6941 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12910 event pairs, 265 based on Foata normal form. 38/2154 useless extension candidates. Maximal degree in co-relation 7610. Up to 737 conditions per place. [2024-11-17 03:42:54,175 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 96 selfloop transitions, 67 changer transitions 7/176 dead transitions. [2024-11-17 03:42:54,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 176 transitions, 1617 flow [2024-11-17 03:42:54,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:42:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:42:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 324 transitions. [2024-11-17 03:42:54,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.601113172541744 [2024-11-17 03:42:54,176 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 706 flow. Second operand 11 states and 324 transitions. [2024-11-17 03:42:54,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 176 transitions, 1617 flow [2024-11-17 03:42:54,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 176 transitions, 1583 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:54,190 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 1266 flow [2024-11-17 03:42:54,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1266, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-11-17 03:42:54,190 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 50 predicate places. [2024-11-17 03:42:54,190 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 1266 flow [2024-11-17 03:42:54,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:54,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:54,190 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:54,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 03:42:54,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:54,391 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:54,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -673217150, now seen corresponding path program 6 times [2024-11-17 03:42:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:54,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473751080] [2024-11-17 03:42:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:54,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:54,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:54,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473751080] [2024-11-17 03:42:54,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473751080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:54,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:54,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:54,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887417895] [2024-11-17 03:42:54,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:54,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:54,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-17 03:42:54,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 1266 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:54,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:54,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-17 03:42:54,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:54,664 INFO L124 PetriNetUnfolderBase]: 932/1855 cut-off events. [2024-11-17 03:42:54,665 INFO L125 PetriNetUnfolderBase]: For 10123/10159 co-relation queries the response was YES. [2024-11-17 03:42:54,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7951 conditions, 1855 events. 932/1855 cut-off events. For 10123/10159 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11577 event pairs, 381 based on Foata normal form. 16/1829 useless extension candidates. Maximal degree in co-relation 6723. Up to 1059 conditions per place. [2024-11-17 03:42:54,683 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 118 selfloop transitions, 13 changer transitions 3/143 dead transitions. [2024-11-17 03:42:54,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 143 transitions, 1737 flow [2024-11-17 03:42:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-11-17 03:42:54,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6081632653061224 [2024-11-17 03:42:54,685 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 1266 flow. Second operand 5 states and 149 transitions. [2024-11-17 03:42:54,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 143 transitions, 1737 flow [2024-11-17 03:42:54,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 143 transitions, 1661 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:54,705 INFO L231 Difference]: Finished difference. Result has 101 places, 116 transitions, 1257 flow [2024-11-17 03:42:54,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1257, PETRI_PLACES=101, PETRI_TRANSITIONS=116} [2024-11-17 03:42:54,705 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 54 predicate places. [2024-11-17 03:42:54,705 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 1257 flow [2024-11-17 03:42:54,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:54,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:54,705 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:54,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:42:54,706 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:54,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1821960716, now seen corresponding path program 7 times [2024-11-17 03:42:54,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:54,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876813301] [2024-11-17 03:42:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:54,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:54,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:54,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876813301] [2024-11-17 03:42:54,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876813301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:54,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:54,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:54,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548630516] [2024-11-17 03:42:54,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:54,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:54,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:54,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:54,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:54,814 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:42:54,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 116 transitions, 1257 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:54,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:54,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:42:54,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:55,106 INFO L124 PetriNetUnfolderBase]: 1033/1968 cut-off events. [2024-11-17 03:42:55,106 INFO L125 PetriNetUnfolderBase]: For 11175/11175 co-relation queries the response was YES. [2024-11-17 03:42:55,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8679 conditions, 1968 events. 1033/1968 cut-off events. For 11175/11175 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11752 event pairs, 474 based on Foata normal form. 4/1968 useless extension candidates. Maximal degree in co-relation 7361. Up to 1224 conditions per place. [2024-11-17 03:42:55,118 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 109 selfloop transitions, 24 changer transitions 6/145 dead transitions. [2024-11-17 03:42:55,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 145 transitions, 1729 flow [2024-11-17 03:42:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-17 03:42:55,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2024-11-17 03:42:55,120 INFO L175 Difference]: Start difference. First operand has 101 places, 116 transitions, 1257 flow. Second operand 5 states and 153 transitions. [2024-11-17 03:42:55,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 145 transitions, 1729 flow [2024-11-17 03:42:55,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 145 transitions, 1703 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:55,138 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 1321 flow [2024-11-17 03:42:55,139 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1321, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2024-11-17 03:42:55,139 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 56 predicate places. [2024-11-17 03:42:55,139 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 1321 flow [2024-11-17 03:42:55,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:55,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:55,139 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:55,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:42:55,140 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:55,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1276034192, now seen corresponding path program 8 times [2024-11-17 03:42:55,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:55,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381421978] [2024-11-17 03:42:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:55,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:55,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381421978] [2024-11-17 03:42:55,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381421978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118227050] [2024-11-17 03:42:55,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:42:55,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:55,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:55,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:42:55,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:42:55,264 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:42:55,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:55,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:55,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:55,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:55,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118227050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:55,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:55,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-17 03:42:55,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744766301] [2024-11-17 03:42:55,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:55,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:42:55,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:42:55,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:42:55,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:42:55,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 118 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:55,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:55,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:42:55,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:55,644 INFO L124 PetriNetUnfolderBase]: 1019/1918 cut-off events. [2024-11-17 03:42:55,645 INFO L125 PetriNetUnfolderBase]: For 11559/11559 co-relation queries the response was YES. [2024-11-17 03:42:55,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8591 conditions, 1918 events. 1019/1918 cut-off events. For 11559/11559 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11154 event pairs, 372 based on Foata normal form. 18/1932 useless extension candidates. Maximal degree in co-relation 7764. Up to 984 conditions per place. [2024-11-17 03:42:55,655 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 118 selfloop transitions, 50 changer transitions 2/176 dead transitions. [2024-11-17 03:42:55,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 176 transitions, 2071 flow [2024-11-17 03:42:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:42:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:42:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-11-17 03:42:55,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691609977324263 [2024-11-17 03:42:55,657 INFO L175 Difference]: Start difference. First operand has 103 places, 118 transitions, 1321 flow. Second operand 9 states and 251 transitions. [2024-11-17 03:42:55,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 176 transitions, 2071 flow [2024-11-17 03:42:55,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 176 transitions, 1985 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-17 03:42:55,677 INFO L231 Difference]: Finished difference. Result has 110 places, 126 transitions, 1494 flow [2024-11-17 03:42:55,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1494, PETRI_PLACES=110, PETRI_TRANSITIONS=126} [2024-11-17 03:42:55,678 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 63 predicate places. [2024-11-17 03:42:55,678 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 126 transitions, 1494 flow [2024-11-17 03:42:55,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.0) internal successors, (207), 9 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:55,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:55,678 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:55,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:42:55,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-17 03:42:55,882 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:55,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1770091072, now seen corresponding path program 1 times [2024-11-17 03:42:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:55,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200895512] [2024-11-17 03:42:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:55,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:56,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:56,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200895512] [2024-11-17 03:42:56,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200895512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:56,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556719166] [2024-11-17 03:42:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:56,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:56,103 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:42:56,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:42:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:56,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:56,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:56,195 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:42:56,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556719166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:56,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:42:56,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2024-11-17 03:42:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154033807] [2024-11-17 03:42:56,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:56,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:42:56,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-17 03:42:56,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 126 transitions, 1494 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:56,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:56,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-17 03:42:56,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:56,432 INFO L124 PetriNetUnfolderBase]: 957/1809 cut-off events. [2024-11-17 03:42:56,432 INFO L125 PetriNetUnfolderBase]: For 13048/13073 co-relation queries the response was YES. [2024-11-17 03:42:56,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8944 conditions, 1809 events. 957/1809 cut-off events. For 13048/13073 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10493 event pairs, 142 based on Foata normal form. 46/1846 useless extension candidates. Maximal degree in co-relation 8456. Up to 866 conditions per place. [2024-11-17 03:42:56,444 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 120 selfloop transitions, 34 changer transitions 3/164 dead transitions. [2024-11-17 03:42:56,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 164 transitions, 2112 flow [2024-11-17 03:42:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:42:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:42:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-11-17 03:42:56,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6005830903790087 [2024-11-17 03:42:56,445 INFO L175 Difference]: Start difference. First operand has 110 places, 126 transitions, 1494 flow. Second operand 7 states and 206 transitions. [2024-11-17 03:42:56,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 164 transitions, 2112 flow [2024-11-17 03:42:56,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 164 transitions, 2051 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-17 03:42:56,491 INFO L231 Difference]: Finished difference. Result has 113 places, 133 transitions, 1663 flow [2024-11-17 03:42:56,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1663, PETRI_PLACES=113, PETRI_TRANSITIONS=133} [2024-11-17 03:42:56,492 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 66 predicate places. [2024-11-17 03:42:56,492 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 133 transitions, 1663 flow [2024-11-17 03:42:56,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:56,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:56,492 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:56,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:42:56,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:56,693 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:42:56,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash -406191239, now seen corresponding path program 1 times [2024-11-17 03:42:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:56,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952388154] [2024-11-17 03:42:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:56,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:56,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:56,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952388154] [2024-11-17 03:42:56,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952388154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:56,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101725701] [2024-11-17 03:42:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:56,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:56,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:56,906 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:42:56,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:42:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:56,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:42:56,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:57,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-17 03:42:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:57,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:57,339 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:42:57,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-17 03:42:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:57,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101725701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:57,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:57,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 23 [2024-11-17 03:42:57,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231616266] [2024-11-17 03:42:57,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:57,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:42:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:42:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:42:58,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-11-17 03:42:58,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 133 transitions, 1663 flow. Second operand has 23 states, 23 states have (on average 22.043478260869566) internal successors, (507), 23 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:58,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:58,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-11-17 03:42:58,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:59,967 INFO L124 PetriNetUnfolderBase]: 1961/3651 cut-off events. [2024-11-17 03:42:59,968 INFO L125 PetriNetUnfolderBase]: For 27297/27297 co-relation queries the response was YES. [2024-11-17 03:42:59,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17535 conditions, 3651 events. 1961/3651 cut-off events. For 27297/27297 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 23137 event pairs, 202 based on Foata normal form. 13/3664 useless extension candidates. Maximal degree in co-relation 17500. Up to 610 conditions per place. [2024-11-17 03:42:59,986 INFO L140 encePairwiseOnDemand]: 32/49 looper letters, 181 selfloop transitions, 89 changer transitions 230/504 dead transitions. [2024-11-17 03:42:59,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 504 transitions, 5786 flow [2024-11-17 03:42:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-17 03:42:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-17 03:42:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1239 transitions. [2024-11-17 03:42:59,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-11-17 03:42:59,995 INFO L175 Difference]: Start difference. First operand has 113 places, 133 transitions, 1663 flow. Second operand 47 states and 1239 transitions. [2024-11-17 03:42:59,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 504 transitions, 5786 flow [2024-11-17 03:43:00,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 504 transitions, 5638 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-17 03:43:00,044 INFO L231 Difference]: Finished difference. Result has 170 places, 149 transitions, 2061 flow [2024-11-17 03:43:00,044 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2061, PETRI_PLACES=170, PETRI_TRANSITIONS=149} [2024-11-17 03:43:00,045 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 123 predicate places. [2024-11-17 03:43:00,045 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 149 transitions, 2061 flow [2024-11-17 03:43:00,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 22.043478260869566) internal successors, (507), 23 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:43:00,045 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:00,045 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:00,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-17 03:43:00,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:00,249 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:43:00,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:00,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1155545276, now seen corresponding path program 2 times [2024-11-17 03:43:00,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:00,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300808629] [2024-11-17 03:43:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:00,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:43:00,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:00,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300808629] [2024-11-17 03:43:00,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300808629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:00,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493747651] [2024-11-17 03:43:00,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:43:00,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:00,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:00,519 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:43:00,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:43:00,589 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:43:00,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:00,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:43:00,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:43:00,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:43:00,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493747651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:00,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:00,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2024-11-17 03:43:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445247212] [2024-11-17 03:43:00,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:00,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:43:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:00,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:43:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:43:00,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-17 03:43:00,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 149 transitions, 2061 flow. Second operand has 15 states, 15 states have (on average 22.733333333333334) internal successors, (341), 15 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:43:00,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:00,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-17 03:43:00,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:01,394 INFO L124 PetriNetUnfolderBase]: 1183/2228 cut-off events. [2024-11-17 03:43:01,394 INFO L125 PetriNetUnfolderBase]: For 32322/32322 co-relation queries the response was YES. [2024-11-17 03:43:01,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 2228 events. 1183/2228 cut-off events. For 32322/32322 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12228 event pairs, 258 based on Foata normal form. 160/2385 useless extension candidates. Maximal degree in co-relation 12518. Up to 671 conditions per place. [2024-11-17 03:43:01,411 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 188 selfloop transitions, 89 changer transitions 0/282 dead transitions. [2024-11-17 03:43:01,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 282 transitions, 3992 flow [2024-11-17 03:43:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:43:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:43:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 410 transitions. [2024-11-17 03:43:01,416 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.597667638483965 [2024-11-17 03:43:01,416 INFO L175 Difference]: Start difference. First operand has 170 places, 149 transitions, 2061 flow. Second operand 14 states and 410 transitions. [2024-11-17 03:43:01,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 282 transitions, 3992 flow [2024-11-17 03:43:01,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 282 transitions, 3514 flow, removed 87 selfloop flow, removed 25 redundant places. [2024-11-17 03:43:01,462 INFO L231 Difference]: Finished difference. Result has 129 places, 171 transitions, 2400 flow [2024-11-17 03:43:01,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2400, PETRI_PLACES=129, PETRI_TRANSITIONS=171} [2024-11-17 03:43:01,463 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 82 predicate places. [2024-11-17 03:43:01,463 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 171 transitions, 2400 flow [2024-11-17 03:43:01,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.733333333333334) internal successors, (341), 15 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:43:01,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:01,463 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:01,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:43:01,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-17 03:43:01,664 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-17 03:43:01,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2039652239, now seen corresponding path program 3 times [2024-11-17 03:43:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:01,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411634611] [2024-11-17 03:43:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:01,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:03,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:03,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411634611] [2024-11-17 03:43:03,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411634611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:03,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036975643] [2024-11-17 03:43:03,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:43:03,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:03,804 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:43:03,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:43:03,927 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-17 03:43:03,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:03,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-17 03:43:03,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:04,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-17 03:43:04,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:43:04,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2024-11-17 03:43:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:04,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:05,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 320 treesize of output 280 [2024-11-17 03:43:06,698 INFO L349 Elim1Store]: treesize reduction 5, result has 99.1 percent of original size [2024-11-17 03:43:06,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 4462 treesize of output 2909