./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 18:51:08,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 18:51:08,291 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 18:51:08,298 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 18:51:08,300 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 18:51:08,333 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 18:51:08,334 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 18:51:08,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 18:51:08,335 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 18:51:08,336 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 18:51:08,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 18:51:08,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 18:51:08,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 18:51:08,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 18:51:08,342 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 18:51:08,343 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 18:51:08,343 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 18:51:08,343 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 18:51:08,344 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 18:51:08,344 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 18:51:08,344 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 18:51:08,345 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 18:51:08,345 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 18:51:08,346 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 18:51:08,346 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 18:51:08,346 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 18:51:08,346 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 18:51:08,347 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 18:51:08,347 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 18:51:08,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 18:51:08,347 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 18:51:08,348 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 18:51:08,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 18:51:08,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 18:51:08,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 18:51:08,349 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 18:51:08,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 18:51:08,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 18:51:08,351 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 18:51:08,352 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 18:51:08,352 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 18:51:08,352 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 18:51:08,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2024-10-24 18:51:08,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 18:51:08,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 18:51:08,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 18:51:08,655 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 18:51:08,656 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 18:51:08,657 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2024-10-24 18:51:10,216 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 18:51:10,533 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 18:51:10,534 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2024-10-24 18:51:10,556 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc1566b1e/2a7bc3d36acc4fdd94bc656f3cd0512d/FLAG01ec6583e [2024-10-24 18:51:10,576 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc1566b1e/2a7bc3d36acc4fdd94bc656f3cd0512d [2024-10-24 18:51:10,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 18:51:10,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 18:51:10,583 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 18:51:10,584 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 18:51:10,589 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 18:51:10,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:51:10" (1/1) ... [2024-10-24 18:51:10,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4422df2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:10, skipping insertion in model container [2024-10-24 18:51:10,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:51:10" (1/1) ... [2024-10-24 18:51:10,650 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 18:51:11,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 18:51:11,172 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 18:51:11,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 18:51:11,345 INFO L204 MainTranslator]: Completed translation [2024-10-24 18:51:11,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11 WrapperNode [2024-10-24 18:51:11,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 18:51:11,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 18:51:11,346 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 18:51:11,346 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 18:51:11,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,402 INFO L138 Inliner]: procedures = 277, calls = 31, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 150 [2024-10-24 18:51:11,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 18:51:11,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 18:51:11,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 18:51:11,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 18:51:11,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,419 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,435 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-10-24 18:51:11,436 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,443 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,446 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,453 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 18:51:11,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 18:51:11,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 18:51:11,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 18:51:11,455 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (1/1) ... [2024-10-24 18:51:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 18:51:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:11,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 18:51:11,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 18:51:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-24 18:51:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-24 18:51:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-24 18:51:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-24 18:51:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 18:51:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 18:51:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 18:51:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 18:51:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 18:51:11,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 18:51:11,561 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 18:51:11,700 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 18:51:11,702 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 18:51:11,993 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 18:51:11,993 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 18:51:12,181 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 18:51:12,181 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 18:51:12,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:51:12 BoogieIcfgContainer [2024-10-24 18:51:12,181 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 18:51:12,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 18:51:12,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 18:51:12,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 18:51:12,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:51:10" (1/3) ... [2024-10-24 18:51:12,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62908310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:51:12, skipping insertion in model container [2024-10-24 18:51:12,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:51:11" (2/3) ... [2024-10-24 18:51:12,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62908310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:51:12, skipping insertion in model container [2024-10-24 18:51:12,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:51:12" (3/3) ... [2024-10-24 18:51:12,194 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-10-24 18:51:12,212 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 18:51:12,212 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-10-24 18:51:12,212 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 18:51:12,281 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 18:51:12,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 122 flow [2024-10-24 18:51:12,369 INFO L124 PetriNetUnfolderBase]: 9/52 cut-off events. [2024-10-24 18:51:12,370 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 18:51:12,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 9/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-10-24 18:51:12,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 122 flow [2024-10-24 18:51:12,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 51 transitions, 114 flow [2024-10-24 18:51:12,393 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 18:51:12,401 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;@610c5f46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 18:51:12,401 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-24 18:51:12,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 18:51:12,409 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-24 18:51:12,409 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 18:51:12,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:12,410 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:12,410 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:12,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:12,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1513825994, now seen corresponding path program 1 times [2024-10-24 18:51:12,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:12,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962124352] [2024-10-24 18:51:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:12,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:12,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:12,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:12,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962124352] [2024-10-24 18:51:12,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962124352] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:12,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:12,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 18:51:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778764560] [2024-10-24 18:51:12,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:12,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 18:51:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 18:51:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 18:51:12,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:12,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:12,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:12,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:12,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:13,219 INFO L124 PetriNetUnfolderBase]: 459/863 cut-off events. [2024-10-24 18:51:13,220 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-24 18:51:13,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 863 events. 459/863 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4264 event pairs, 245 based on Foata normal form. 90/827 useless extension candidates. Maximal degree in co-relation 1557. Up to 520 conditions per place. [2024-10-24 18:51:13,232 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 43 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-10-24 18:51:13,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 225 flow [2024-10-24 18:51:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 18:51:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 18:51:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-24 18:51:13,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-10-24 18:51:13,250 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 114 flow. Second operand 4 states and 113 transitions. [2024-10-24 18:51:13,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 225 flow [2024-10-24 18:51:13,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 18:51:13,261 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 98 flow [2024-10-24 18:51:13,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-10-24 18:51:13,271 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2024-10-24 18:51:13,271 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 98 flow [2024-10-24 18:51:13,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:13,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:13,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:13,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 18:51:13,272 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:13,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1513825993, now seen corresponding path program 1 times [2024-10-24 18:51:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339959451] [2024-10-24 18:51:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:13,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:13,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:13,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339959451] [2024-10-24 18:51:13,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339959451] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:13,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:13,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:13,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001788342] [2024-10-24 18:51:13,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:13,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:51:13,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:51:13,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:51:13,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:13,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:13,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:13,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:13,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:13,935 INFO L124 PetriNetUnfolderBase]: 574/1065 cut-off events. [2024-10-24 18:51:13,935 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-10-24 18:51:13,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1065 events. 574/1065 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5035 event pairs, 179 based on Foata normal form. 9/927 useless extension candidates. Maximal degree in co-relation 695. Up to 755 conditions per place. [2024-10-24 18:51:13,945 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 59 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-10-24 18:51:13,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 293 flow [2024-10-24 18:51:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:51:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:51:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-24 18:51:13,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-10-24 18:51:13,948 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 98 flow. Second operand 5 states and 143 transitions. [2024-10-24 18:51:13,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 293 flow [2024-10-24 18:51:13,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 75 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 18:51:13,951 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 128 flow [2024-10-24 18:51:13,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-10-24 18:51:13,952 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-10-24 18:51:13,952 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 128 flow [2024-10-24 18:51:13,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:13,952 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:13,952 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:13,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 18:51:13,953 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:13,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash 428649340, now seen corresponding path program 1 times [2024-10-24 18:51:13,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:13,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117717725] [2024-10-24 18:51:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:13,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117717725] [2024-10-24 18:51:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117717725] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:14,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:14,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 18:51:14,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449817050] [2024-10-24 18:51:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:14,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 18:51:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 18:51:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 18:51:14,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:14,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:14,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:14,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:14,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:14,311 INFO L124 PetriNetUnfolderBase]: 823/1512 cut-off events. [2024-10-24 18:51:14,311 INFO L125 PetriNetUnfolderBase]: For 255/258 co-relation queries the response was YES. [2024-10-24 18:51:14,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1512 events. 823/1512 cut-off events. For 255/258 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7707 event pairs, 363 based on Foata normal form. 1/1368 useless extension candidates. Maximal degree in co-relation 1126. Up to 857 conditions per place. [2024-10-24 18:51:14,323 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 68 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-10-24 18:51:14,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 370 flow [2024-10-24 18:51:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 18:51:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 18:51:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-10-24 18:51:14,325 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-24 18:51:14,325 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 128 flow. Second operand 4 states and 135 transitions. [2024-10-24 18:51:14,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 370 flow [2024-10-24 18:51:14,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 86 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:14,332 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 159 flow [2024-10-24 18:51:14,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-10-24 18:51:14,333 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-10-24 18:51:14,334 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 159 flow [2024-10-24 18:51:14,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:14,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:14,334 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:14,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 18:51:14,335 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:14,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:14,335 INFO L85 PathProgramCache]: Analyzing trace with hash 944670899, now seen corresponding path program 1 times [2024-10-24 18:51:14,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:14,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576992704] [2024-10-24 18:51:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:14,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:14,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576992704] [2024-10-24 18:51:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576992704] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:14,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:14,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:14,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14265185] [2024-10-24 18:51:14,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:14,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:14,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:14,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:14,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:14,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:14,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:14,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:14,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:14,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:14,655 INFO L124 PetriNetUnfolderBase]: 957/1712 cut-off events. [2024-10-24 18:51:14,656 INFO L125 PetriNetUnfolderBase]: For 518/522 co-relation queries the response was YES. [2024-10-24 18:51:14,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4008 conditions, 1712 events. 957/1712 cut-off events. For 518/522 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8850 event pairs, 395 based on Foata normal form. 14/1573 useless extension candidates. Maximal degree in co-relation 1265. Up to 1191 conditions per place. [2024-10-24 18:51:14,665 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-10-24 18:51:14,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 328 flow [2024-10-24 18:51:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-24 18:51:14,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-10-24 18:51:14,669 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 159 flow. Second operand 3 states and 103 transitions. [2024-10-24 18:51:14,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 328 flow [2024-10-24 18:51:14,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:14,675 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 168 flow [2024-10-24 18:51:14,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-10-24 18:51:14,676 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2024-10-24 18:51:14,676 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 168 flow [2024-10-24 18:51:14,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:14,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:14,677 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:14,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 18:51:14,677 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:14,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash 551578351, now seen corresponding path program 1 times [2024-10-24 18:51:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:14,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488255675] [2024-10-24 18:51:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:14,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:14,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488255675] [2024-10-24 18:51:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488255675] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:14,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:14,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:14,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96249158] [2024-10-24 18:51:14,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:14,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:14,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:14,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:14,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:14,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:14,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:14,894 INFO L124 PetriNetUnfolderBase]: 499/1032 cut-off events. [2024-10-24 18:51:14,894 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2024-10-24 18:51:14,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2391 conditions, 1032 events. 499/1032 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4789 event pairs, 105 based on Foata normal form. 60/1020 useless extension candidates. Maximal degree in co-relation 989. Up to 634 conditions per place. [2024-10-24 18:51:14,901 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 45 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-10-24 18:51:14,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 300 flow [2024-10-24 18:51:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-24 18:51:14,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-10-24 18:51:14,904 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 168 flow. Second operand 3 states and 91 transitions. [2024-10-24 18:51:14,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 300 flow [2024-10-24 18:51:14,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 292 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:14,911 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 170 flow [2024-10-24 18:51:14,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-10-24 18:51:14,912 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2024-10-24 18:51:14,914 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 170 flow [2024-10-24 18:51:14,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:14,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:14,914 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:14,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 18:51:14,915 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:14,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1443641797, now seen corresponding path program 1 times [2024-10-24 18:51:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:14,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006360397] [2024-10-24 18:51:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:14,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:15,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:15,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006360397] [2024-10-24 18:51:15,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006360397] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:15,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995098687] [2024-10-24 18:51:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:15,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:15,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:15,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 18:51:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:15,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 18:51:15,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:15,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:15,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995098687] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:15,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:15,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-24 18:51:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169147923] [2024-10-24 18:51:15,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:15,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 18:51:15,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 18:51:15,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-24 18:51:15,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:15,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 170 flow. Second operand has 14 states, 14 states have (on average 17.214285714285715) internal successors, (241), 14 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:15,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:15,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:15,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:16,774 INFO L124 PetriNetUnfolderBase]: 1740/3508 cut-off events. [2024-10-24 18:51:16,774 INFO L125 PetriNetUnfolderBase]: For 798/798 co-relation queries the response was YES. [2024-10-24 18:51:16,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8219 conditions, 3508 events. 1740/3508 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 19723 event pairs, 262 based on Foata normal form. 54/3327 useless extension candidates. Maximal degree in co-relation 2561. Up to 699 conditions per place. [2024-10-24 18:51:16,796 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 194 selfloop transitions, 26 changer transitions 0/231 dead transitions. [2024-10-24 18:51:16,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 231 transitions, 1170 flow [2024-10-24 18:51:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 18:51:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 18:51:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 425 transitions. [2024-10-24 18:51:16,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-10-24 18:51:16,799 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 170 flow. Second operand 15 states and 425 transitions. [2024-10-24 18:51:16,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 231 transitions, 1170 flow [2024-10-24 18:51:16,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 231 transitions, 1148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:16,809 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 417 flow [2024-10-24 18:51:16,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=417, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-10-24 18:51:16,811 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-10-24 18:51:16,812 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 417 flow [2024-10-24 18:51:16,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.214285714285715) internal successors, (241), 14 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:16,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:16,813 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:16,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 18:51:17,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-24 18:51:17,018 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:17,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash 193444722, now seen corresponding path program 1 times [2024-10-24 18:51:17,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:17,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572478667] [2024-10-24 18:51:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:17,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:17,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572478667] [2024-10-24 18:51:17,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572478667] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:17,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:17,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 18:51:17,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486068740] [2024-10-24 18:51:17,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:17,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:51:17,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:17,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:51:17,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:51:17,145 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:17,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 417 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:17,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:17,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:17,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:17,580 INFO L124 PetriNetUnfolderBase]: 1695/3428 cut-off events. [2024-10-24 18:51:17,580 INFO L125 PetriNetUnfolderBase]: For 1900/1900 co-relation queries the response was YES. [2024-10-24 18:51:17,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8806 conditions, 3428 events. 1695/3428 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 19780 event pairs, 958 based on Foata normal form. 0/3314 useless extension candidates. Maximal degree in co-relation 7328. Up to 2028 conditions per place. [2024-10-24 18:51:17,610 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 55 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-10-24 18:51:17,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 591 flow [2024-10-24 18:51:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:51:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:51:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-10-24 18:51:17,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-24 18:51:17,612 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 417 flow. Second operand 5 states and 117 transitions. [2024-10-24 18:51:17,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 591 flow [2024-10-24 18:51:17,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 581 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-10-24 18:51:17,625 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 441 flow [2024-10-24 18:51:17,626 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=441, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-10-24 18:51:17,626 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2024-10-24 18:51:17,626 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 441 flow [2024-10-24 18:51:17,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:17,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:17,627 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:17,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 18:51:17,627 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:17,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:17,628 INFO L85 PathProgramCache]: Analyzing trace with hash 193444723, now seen corresponding path program 1 times [2024-10-24 18:51:17,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:17,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451341452] [2024-10-24 18:51:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:17,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:17,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:17,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451341452] [2024-10-24 18:51:17,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451341452] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:17,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:17,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 18:51:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91883596] [2024-10-24 18:51:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:17,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 18:51:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 18:51:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-24 18:51:18,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:18,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:18,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:18,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:18,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:18,673 INFO L124 PetriNetUnfolderBase]: 1885/3762 cut-off events. [2024-10-24 18:51:18,673 INFO L125 PetriNetUnfolderBase]: For 3007/3007 co-relation queries the response was YES. [2024-10-24 18:51:18,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10016 conditions, 3762 events. 1885/3762 cut-off events. For 3007/3007 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 21550 event pairs, 514 based on Foata normal form. 0/3616 useless extension candidates. Maximal degree in co-relation 8461. Up to 2781 conditions per place. [2024-10-24 18:51:18,703 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 113 selfloop transitions, 9 changer transitions 0/132 dead transitions. [2024-10-24 18:51:18,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 132 transitions, 898 flow [2024-10-24 18:51:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 18:51:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 18:51:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-10-24 18:51:18,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2024-10-24 18:51:18,708 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 441 flow. Second operand 8 states and 205 transitions. [2024-10-24 18:51:18,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 132 transitions, 898 flow [2024-10-24 18:51:18,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 132 transitions, 852 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 18:51:18,729 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 476 flow [2024-10-24 18:51:18,729 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-10-24 18:51:18,732 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2024-10-24 18:51:18,732 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 476 flow [2024-10-24 18:51:18,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:18,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:18,733 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:18,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 18:51:18,733 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:18,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 604666711, now seen corresponding path program 1 times [2024-10-24 18:51:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:18,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800384647] [2024-10-24 18:51:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:18,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:18,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800384647] [2024-10-24 18:51:18,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800384647] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:18,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:18,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:18,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731833571] [2024-10-24 18:51:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:18,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:18,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:18,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:18,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:18,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:18,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:18,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:19,551 INFO L124 PetriNetUnfolderBase]: 2725/5696 cut-off events. [2024-10-24 18:51:19,551 INFO L125 PetriNetUnfolderBase]: For 4048/4048 co-relation queries the response was YES. [2024-10-24 18:51:19,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14627 conditions, 5696 events. 2725/5696 cut-off events. For 4048/4048 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 38070 event pairs, 1359 based on Foata normal form. 137/5631 useless extension candidates. Maximal degree in co-relation 12613. Up to 3244 conditions per place. [2024-10-24 18:51:19,588 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 122 selfloop transitions, 2 changer transitions 0/136 dead transitions. [2024-10-24 18:51:19,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 1114 flow [2024-10-24 18:51:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-10-24 18:51:19,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-10-24 18:51:19,590 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 476 flow. Second operand 3 states and 104 transitions. [2024-10-24 18:51:19,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 1114 flow [2024-10-24 18:51:19,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 136 transitions, 1094 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-24 18:51:19,609 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 477 flow [2024-10-24 18:51:19,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=477, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2024-10-24 18:51:19,610 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-10-24 18:51:19,611 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 477 flow [2024-10-24 18:51:19,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:19,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:19,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:19,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 18:51:19,612 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:19,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1060628401, now seen corresponding path program 1 times [2024-10-24 18:51:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:19,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333823652] [2024-10-24 18:51:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:19,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:20,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:20,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333823652] [2024-10-24 18:51:20,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333823652] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:20,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:20,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 18:51:20,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536689957] [2024-10-24 18:51:20,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:20,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 18:51:20,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:20,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 18:51:20,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-24 18:51:20,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:20,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 477 flow. Second operand has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:20,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:20,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:20,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:21,588 INFO L124 PetriNetUnfolderBase]: 3462/7027 cut-off events. [2024-10-24 18:51:21,588 INFO L125 PetriNetUnfolderBase]: For 5802/5802 co-relation queries the response was YES. [2024-10-24 18:51:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19737 conditions, 7027 events. 3462/7027 cut-off events. For 5802/5802 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 44936 event pairs, 786 based on Foata normal form. 0/6807 useless extension candidates. Maximal degree in co-relation 16162. Up to 3938 conditions per place. [2024-10-24 18:51:21,654 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 156 selfloop transitions, 10 changer transitions 0/178 dead transitions. [2024-10-24 18:51:21,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1281 flow [2024-10-24 18:51:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 18:51:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 18:51:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-10-24 18:51:21,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512962962962963 [2024-10-24 18:51:21,657 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 477 flow. Second operand 10 states and 277 transitions. [2024-10-24 18:51:21,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1281 flow [2024-10-24 18:51:21,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 178 transitions, 1271 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:21,688 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 521 flow [2024-10-24 18:51:21,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=521, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2024-10-24 18:51:21,690 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 51 predicate places. [2024-10-24 18:51:21,690 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 521 flow [2024-10-24 18:51:21,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:21,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:21,691 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2024-10-24 18:51:21,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 18:51:21,691 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:21,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:21,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1301296529, now seen corresponding path program 1 times [2024-10-24 18:51:21,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:21,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695169362] [2024-10-24 18:51:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:21,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:21,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695169362] [2024-10-24 18:51:21,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695169362] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503768764] [2024-10-24 18:51:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:21,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:21,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:21,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 18:51:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:21,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 18:51:21,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 18:51:22,025 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 18:51:22,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503768764] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:22,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 18:51:22,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-10-24 18:51:22,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926928827] [2024-10-24 18:51:22,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:22,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:22,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:22,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:22,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:51:22,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:22,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:22,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:22,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:22,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:22,802 INFO L124 PetriNetUnfolderBase]: 3504/7050 cut-off events. [2024-10-24 18:51:22,802 INFO L125 PetriNetUnfolderBase]: For 6713/6713 co-relation queries the response was YES. [2024-10-24 18:51:22,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20237 conditions, 7050 events. 3504/7050 cut-off events. For 6713/6713 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 46039 event pairs, 2843 based on Foata normal form. 19/6839 useless extension candidates. Maximal degree in co-relation 16629. Up to 6094 conditions per place. [2024-10-24 18:51:22,859 INFO L140 encePairwiseOnDemand]: 52/54 looper letters, 69 selfloop transitions, 1 changer transitions 2/82 dead transitions. [2024-10-24 18:51:22,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 82 transitions, 661 flow [2024-10-24 18:51:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-10-24 18:51:22,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-10-24 18:51:22,861 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 521 flow. Second operand 3 states and 77 transitions. [2024-10-24 18:51:22,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 82 transitions, 661 flow [2024-10-24 18:51:22,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 643 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-24 18:51:22,897 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 498 flow [2024-10-24 18:51:22,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=498, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2024-10-24 18:51:22,898 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2024-10-24 18:51:22,898 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 498 flow [2024-10-24 18:51:22,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:22,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:22,898 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:22,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 18:51:23,102 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,SelfDestructingSolverStorable10 [2024-10-24 18:51:23,103 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:23,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:23,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1054932405, now seen corresponding path program 1 times [2024-10-24 18:51:23,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:23,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77047912] [2024-10-24 18:51:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:23,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:23,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:23,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77047912] [2024-10-24 18:51:23,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77047912] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:23,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071936417] [2024-10-24 18:51:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:23,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:23,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:23,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:23,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 18:51:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:23,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 18:51:23,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:23,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071936417] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:24,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:24,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-10-24 18:51:24,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829938436] [2024-10-24 18:51:24,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:24,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 18:51:24,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:24,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 18:51:24,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-24 18:51:24,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:24,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 498 flow. Second operand has 19 states, 19 states have (on average 17.94736842105263) internal successors, (341), 19 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) [2024-10-24 18:51:24,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:24,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:24,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:27,582 INFO L124 PetriNetUnfolderBase]: 6645/13333 cut-off events. [2024-10-24 18:51:27,582 INFO L125 PetriNetUnfolderBase]: For 13434/13434 co-relation queries the response was YES. [2024-10-24 18:51:27,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38359 conditions, 13333 events. 6645/13333 cut-off events. For 13434/13434 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 92341 event pairs, 671 based on Foata normal form. 518/13489 useless extension candidates. Maximal degree in co-relation 38324. Up to 2269 conditions per place. [2024-10-24 18:51:27,659 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 432 selfloop transitions, 122 changer transitions 0/562 dead transitions. [2024-10-24 18:51:27,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 562 transitions, 3774 flow [2024-10-24 18:51:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-24 18:51:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-10-24 18:51:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 1089 transitions. [2024-10-24 18:51:27,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-10-24 18:51:27,664 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 498 flow. Second operand 44 states and 1089 transitions. [2024-10-24 18:51:27,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 562 transitions, 3774 flow [2024-10-24 18:51:27,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 562 transitions, 3771 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:27,730 INFO L231 Difference]: Finished difference. Result has 166 places, 176 transitions, 1733 flow [2024-10-24 18:51:27,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1733, PETRI_PLACES=166, PETRI_TRANSITIONS=176} [2024-10-24 18:51:27,731 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 117 predicate places. [2024-10-24 18:51:27,731 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 176 transitions, 1733 flow [2024-10-24 18:51:27,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.94736842105263) internal successors, (341), 19 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) [2024-10-24 18:51:27,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:27,732 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:27,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 18:51:27,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:27,933 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:27,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:27,934 INFO L85 PathProgramCache]: Analyzing trace with hash -957330019, now seen corresponding path program 1 times [2024-10-24 18:51:27,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:27,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825201392] [2024-10-24 18:51:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:27,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 18:51:28,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:28,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825201392] [2024-10-24 18:51:28,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825201392] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:28,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:28,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 18:51:28,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708588577] [2024-10-24 18:51:28,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:28,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 18:51:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 18:51:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-24 18:51:28,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:28,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 176 transitions, 1733 flow. Second operand has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:28,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:28,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:28,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:32,239 INFO L124 PetriNetUnfolderBase]: 10095/20048 cut-off events. [2024-10-24 18:51:32,240 INFO L125 PetriNetUnfolderBase]: For 63653/63653 co-relation queries the response was YES. [2024-10-24 18:51:32,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70183 conditions, 20048 events. 10095/20048 cut-off events. For 63653/63653 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 144015 event pairs, 2233 based on Foata normal form. 0/19649 useless extension candidates. Maximal degree in co-relation 70117. Up to 3829 conditions per place. [2024-10-24 18:51:32,449 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 149 selfloop transitions, 227 changer transitions 0/386 dead transitions. [2024-10-24 18:51:32,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 386 transitions, 4240 flow [2024-10-24 18:51:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 18:51:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-24 18:51:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 407 transitions. [2024-10-24 18:51:32,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4433551198257081 [2024-10-24 18:51:32,451 INFO L175 Difference]: Start difference. First operand has 166 places, 176 transitions, 1733 flow. Second operand 17 states and 407 transitions. [2024-10-24 18:51:32,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 386 transitions, 4240 flow [2024-10-24 18:51:32,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 386 transitions, 3781 flow, removed 227 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:32,861 INFO L231 Difference]: Finished difference. Result has 185 places, 288 transitions, 3236 flow [2024-10-24 18:51:32,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3236, PETRI_PLACES=185, PETRI_TRANSITIONS=288} [2024-10-24 18:51:32,863 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 136 predicate places. [2024-10-24 18:51:32,863 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 288 transitions, 3236 flow [2024-10-24 18:51:32,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:32,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:32,864 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:32,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-24 18:51:32,864 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:32,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -194492121, now seen corresponding path program 1 times [2024-10-24 18:51:32,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:32,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383853760] [2024-10-24 18:51:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:32,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:33,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383853760] [2024-10-24 18:51:33,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383853760] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820241183] [2024-10-24 18:51:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:33,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:33,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:33,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:33,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 18:51:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:33,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 18:51:33,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 18:51:33,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 18:51:34,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820241183] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:34,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:34,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-10-24 18:51:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221187087] [2024-10-24 18:51:34,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:34,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 18:51:34,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:34,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 18:51:34,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-10-24 18:51:34,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:34,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 288 transitions, 3236 flow. Second operand has 20 states, 20 states have (on average 18.85) internal successors, (377), 20 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:34,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:34,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:34,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:38,904 INFO L124 PetriNetUnfolderBase]: 10283/20115 cut-off events. [2024-10-24 18:51:38,904 INFO L125 PetriNetUnfolderBase]: For 67462/67468 co-relation queries the response was YES. [2024-10-24 18:51:39,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71927 conditions, 20115 events. 10283/20115 cut-off events. For 67462/67468 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 141574 event pairs, 1567 based on Foata normal form. 202/19950 useless extension candidates. Maximal degree in co-relation 71856. Up to 3511 conditions per place. [2024-10-24 18:51:39,116 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 479 selfloop transitions, 201 changer transitions 0/688 dead transitions. [2024-10-24 18:51:39,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 688 transitions, 7510 flow [2024-10-24 18:51:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-24 18:51:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-24 18:51:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 949 transitions. [2024-10-24 18:51:39,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.474974974974975 [2024-10-24 18:51:39,120 INFO L175 Difference]: Start difference. First operand has 185 places, 288 transitions, 3236 flow. Second operand 37 states and 949 transitions. [2024-10-24 18:51:39,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 688 transitions, 7510 flow [2024-10-24 18:51:39,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 688 transitions, 7071 flow, removed 215 selfloop flow, removed 3 redundant places. [2024-10-24 18:51:39,564 INFO L231 Difference]: Finished difference. Result has 234 places, 328 transitions, 4427 flow [2024-10-24 18:51:39,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4427, PETRI_PLACES=234, PETRI_TRANSITIONS=328} [2024-10-24 18:51:39,566 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 185 predicate places. [2024-10-24 18:51:39,566 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 328 transitions, 4427 flow [2024-10-24 18:51:39,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.85) internal successors, (377), 20 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:39,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:39,567 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:39,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-24 18:51:39,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:39,771 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:39,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1005798662, now seen corresponding path program 1 times [2024-10-24 18:51:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:39,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363115757] [2024-10-24 18:51:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:39,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:39,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363115757] [2024-10-24 18:51:39,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363115757] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:39,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511188718] [2024-10-24 18:51:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:39,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:39,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:39,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 18:51:39,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 18:51:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:40,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 18:51:40,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:40,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:40,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511188718] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:40,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:40,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-10-24 18:51:40,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390031573] [2024-10-24 18:51:40,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:40,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 18:51:40,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:40,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 18:51:40,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-10-24 18:51:40,152 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:40,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 328 transitions, 4427 flow. Second operand has 11 states, 11 states have (on average 21.272727272727273) internal successors, (234), 11 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:40,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:40,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:40,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:49,187 INFO L124 PetriNetUnfolderBase]: 20480/40485 cut-off events. [2024-10-24 18:51:49,187 INFO L125 PetriNetUnfolderBase]: For 245591/245616 co-relation queries the response was YES. [2024-10-24 18:51:49,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159490 conditions, 40485 events. 20480/40485 cut-off events. For 245591/245616 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 307550 event pairs, 6454 based on Foata normal form. 1082/41165 useless extension candidates. Maximal degree in co-relation 159404. Up to 8810 conditions per place. [2024-10-24 18:51:49,976 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 772 selfloop transitions, 193 changer transitions 0/974 dead transitions. [2024-10-24 18:51:49,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 974 transitions, 14863 flow [2024-10-24 18:51:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 18:51:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 18:51:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 413 transitions. [2024-10-24 18:51:49,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6952861952861953 [2024-10-24 18:51:49,978 INFO L175 Difference]: Start difference. First operand has 234 places, 328 transitions, 4427 flow. Second operand 11 states and 413 transitions. [2024-10-24 18:51:49,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 974 transitions, 14863 flow [2024-10-24 18:51:51,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 974 transitions, 13729 flow, removed 334 selfloop flow, removed 27 redundant places. [2024-10-24 18:51:51,441 INFO L231 Difference]: Finished difference. Result has 226 places, 473 transitions, 6530 flow [2024-10-24 18:51:51,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6530, PETRI_PLACES=226, PETRI_TRANSITIONS=473} [2024-10-24 18:51:51,442 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 177 predicate places. [2024-10-24 18:51:51,443 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 473 transitions, 6530 flow [2024-10-24 18:51:51,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.272727272727273) internal successors, (234), 11 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:51,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:51,443 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:51,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 18:51:51,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-24 18:51:51,644 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:51:51,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash -958137939, now seen corresponding path program 1 times [2024-10-24 18:51:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:51,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616662779] [2024-10-24 18:51:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:51,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616662779] [2024-10-24 18:51:53,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616662779] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:53,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009656182] [2024-10-24 18:51:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:53,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:53,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:53,022 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) [2024-10-24 18:51:53,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 18:51:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:53,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-24 18:51:53,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:53,275 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 25 treesize of output 1 [2024-10-24 18:51:53,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 18:51:53,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2024-10-24 18:51:53,628 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 80 treesize of output 32 [2024-10-24 18:51:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:53,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:54,250 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 54 treesize of output 46 [2024-10-24 18:51:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:54,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009656182] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:54,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:54,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-10-24 18:51:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861964431] [2024-10-24 18:51:54,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:54,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-24 18:51:54,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:54,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-24 18:51:54,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 18:51:54,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:54,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 473 transitions, 6530 flow. Second operand has 35 states, 35 states have (on average 19.0) internal successors, (665), 35 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:51:54,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:54,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:54,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:52:12,202 INFO L124 PetriNetUnfolderBase]: 27686/55172 cut-off events. [2024-10-24 18:52:12,202 INFO L125 PetriNetUnfolderBase]: For 353751/353751 co-relation queries the response was YES. [2024-10-24 18:52:12,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222014 conditions, 55172 events. 27686/55172 cut-off events. For 353751/353751 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 445757 event pairs, 3782 based on Foata normal form. 0/54694 useless extension candidates. Maximal degree in co-relation 221922. Up to 9828 conditions per place. [2024-10-24 18:52:13,101 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 319 selfloop transitions, 607 changer transitions 15/960 dead transitions. [2024-10-24 18:52:13,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 960 transitions, 12740 flow [2024-10-24 18:52:13,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-24 18:52:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-24 18:52:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 1020 transitions. [2024-10-24 18:52:13,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-10-24 18:52:13,105 INFO L175 Difference]: Start difference. First operand has 226 places, 473 transitions, 6530 flow. Second operand 43 states and 1020 transitions. [2024-10-24 18:52:13,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 960 transitions, 12740 flow [2024-10-24 18:52:16,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 960 transitions, 12592 flow, removed 74 selfloop flow, removed 0 redundant places. [2024-10-24 18:52:16,329 INFO L231 Difference]: Finished difference. Result has 273 places, 682 transitions, 10914 flow [2024-10-24 18:52:16,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=6446, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=10914, PETRI_PLACES=273, PETRI_TRANSITIONS=682} [2024-10-24 18:52:16,330 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 224 predicate places. [2024-10-24 18:52:16,330 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 682 transitions, 10914 flow [2024-10-24 18:52:16,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 19.0) internal successors, (665), 35 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:16,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:52:16,330 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2024-10-24 18:52:16,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 18:52:16,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-24 18:52:16,531 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-24 18:52:16,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:52:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1471978053, now seen corresponding path program 2 times [2024-10-24 18:52:16,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:52:16,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382489896] [2024-10-24 18:52:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:52:16,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:52:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:52:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:17,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:52:17,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382489896] [2024-10-24 18:52:17,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382489896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:52:17,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809300478] [2024-10-24 18:52:17,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 18:52:17,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:52:17,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:52:17,209 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) [2024-10-24 18:52:17,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 18:52:17,346 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 18:52:17,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 18:52:17,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 18:52:17,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:52:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:17,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:52:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:52:18,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809300478] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:52:18,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:52:18,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2024-10-24 18:52:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660518546] [2024-10-24 18:52:18,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:52:18,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-24 18:52:18,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:52:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-24 18:52:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2024-10-24 18:52:18,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:52:18,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 682 transitions, 10914 flow. Second operand has 27 states, 27 states have (on average 19.22222222222222) internal successors, (519), 27 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 18:52:18,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:52:18,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:52:18,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand