./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-ext/09_fmaxsym.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 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 15:59:55,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 15:59:55,589 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 15:59:55,593 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 15:59:55,594 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 15:59:55,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 15:59:55,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 15:59:55,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 15:59:55,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 15:59:55,628 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 15:59:55,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 15:59:55,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 15:59:55,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 15:59:55,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 15:59:55,635 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 15:59:55,636 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 15:59:55,636 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 15:59:55,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 15:59:55,636 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 15:59:55,636 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 15:59:55,637 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 15:59:55,637 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 15:59:55,638 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 15:59:55,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 15:59:55,638 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 15:59:55,638 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 15:59:55,639 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 15:59:55,639 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 15:59:55,639 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 15:59:55,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 15:59:55,640 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 15:59:55,640 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 15:59:55,640 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 15:59:55,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 15:59:55,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 15:59:55,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 15:59:55,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 15:59:55,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 15:59:55,646 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 15:59:55,646 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 15:59:55,646 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 15:59:55,647 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 15:59:55,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ce2a912f26c96a7a9e9698d6a341c03f1dcacccb179d06c2396dd9f137bcbd1 [2024-11-12 15:59:55,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 15:59:55,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 15:59:56,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 15:59:56,003 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 15:59:56,003 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 15:59:56,004 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-11-12 15:59:57,497 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 15:59:57,773 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 15:59:57,777 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2024-11-12 15:59:57,798 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/891e03f56/4e2d429fd873467b99b2a975d665d886/FLAG86f4c2d8a [2024-11-12 15:59:57,816 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/891e03f56/4e2d429fd873467b99b2a975d665d886 [2024-11-12 15:59:57,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 15:59:57,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 15:59:57,823 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 15:59:57,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 15:59:57,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 15:59:57,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:59:57" (1/1) ... [2024-11-12 15:59:57,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38575660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:57, skipping insertion in model container [2024-11-12 15:59:57,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:59:57" (1/1) ... [2024-11-12 15:59:57,880 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 15:59:58,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 15:59:58,275 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 15:59:58,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 15:59:58,354 INFO L204 MainTranslator]: Completed translation [2024-11-12 15:59:58,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58 WrapperNode [2024-11-12 15:59:58,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 15:59:58,356 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 15:59:58,356 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 15:59:58,357 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 15:59:58,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,378 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,405 INFO L138 Inliner]: procedures = 164, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 93 [2024-11-12 15:59:58,406 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 15:59:58,407 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 15:59:58,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 15:59:58,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 15:59:58,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,428 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,447 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-11-12 15:59:58,448 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,448 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,454 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 15:59:58,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 15:59:58,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 15:59:58,468 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 15:59:58,472 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (1/1) ... [2024-11-12 15:59:58,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 15:59:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 15:59:58,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 15:59:58,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 15:59:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 15:59:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 15:59:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 15:59:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-12 15:59:58,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-12 15:59:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 15:59:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 15:59:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 15:59:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 15:59:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 15:59:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 15:59:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 15:59:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 15:59:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 15:59:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 15:59:58,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 15:59:58,565 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 15:59:58,739 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 15:59:58,741 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 15:59:58,965 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 15:59:58,968 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 15:59:59,122 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 15:59:59,122 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 15:59:59,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:59:59 BoogieIcfgContainer [2024-11-12 15:59:59,123 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 15:59:59,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 15:59:59,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 15:59:59,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 15:59:59,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 03:59:57" (1/3) ... [2024-11-12 15:59:59,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510379d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:59:59, skipping insertion in model container [2024-11-12 15:59:59,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:59:58" (2/3) ... [2024-11-12 15:59:59,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510379d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:59:59, skipping insertion in model container [2024-11-12 15:59:59,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:59:59" (3/3) ... [2024-11-12 15:59:59,133 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2024-11-12 15:59:59,151 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 15:59:59,151 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-12 15:59:59,151 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 15:59:59,202 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 15:59:59,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 72 flow [2024-11-12 15:59:59,274 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-12 15:59:59,275 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 15:59:59,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 4/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 68 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-12 15:59:59,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 72 flow [2024-11-12 15:59:59,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 34 transitions, 72 flow [2024-11-12 15:59:59,294 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 15:59:59,304 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;@1af33aab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 15:59:59,304 INFO L334 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-11-12 15:59:59,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 15:59:59,308 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 15:59:59,308 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 15:59:59,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 15:59:59,309 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 15:59:59,310 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 15:59:59,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 15:59:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash 293954, now seen corresponding path program 1 times [2024-11-12 15:59:59,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 15:59:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555845226] [2024-11-12 15:59:59,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 15:59:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 15:59:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 15:59:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 15:59:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 15:59:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555845226] [2024-11-12 15:59:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555845226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 15:59:59,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 15:59:59,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 15:59:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331777686] [2024-11-12 15:59:59,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 15:59:59,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 15:59:59,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 15:59:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 15:59:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 15:59:59,730 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-12 15:59:59,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 15:59:59,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 15:59:59,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-12 15:59:59,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 15:59:59,800 INFO L124 PetriNetUnfolderBase]: 22/79 cut-off events. [2024-11-12 15:59:59,801 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 15:59:59,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 79 events. 22/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 18 based on Foata normal form. 6/84 useless extension candidates. Maximal degree in co-relation 121. Up to 56 conditions per place. [2024-11-12 15:59:59,803 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 16 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2024-11-12 15:59:59,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 90 flow [2024-11-12 15:59:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 15:59:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 15:59:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-11-12 15:59:59,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-11-12 15:59:59,819 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 72 flow. Second operand 3 states and 52 transitions. [2024-11-12 15:59:59,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 90 flow [2024-11-12 15:59:59,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 15:59:59,824 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 58 flow [2024-11-12 15:59:59,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-11-12 15:59:59,829 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2024-11-12 15:59:59,829 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 58 flow [2024-11-12 15:59:59,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 15:59:59,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 15:59:59,830 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 15:59:59,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 15:59:59,831 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 15:59:59,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 15:59:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 293955, now seen corresponding path program 1 times [2024-11-12 15:59:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 15:59:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909592172] [2024-11-12 15:59:59,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 15:59:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 15:59:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:00,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:00,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909592172] [2024-11-12 16:00:00,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909592172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:00,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:00,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:00:00,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902356772] [2024-11-12 16:00:00,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:00,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:00:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:00:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:00:00,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-11-12 16:00:00,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:00,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:00,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-11-12 16:00:00,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:00,179 INFO L124 PetriNetUnfolderBase]: 22/81 cut-off events. [2024-11-12 16:00:00,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:00:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 81 events. 22/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 18 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 140. Up to 58 conditions per place. [2024-11-12 16:00:00,185 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 18 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-11-12 16:00:00,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 102 flow [2024-11-12 16:00:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:00:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:00:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-11-12 16:00:00,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-11-12 16:00:00,188 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 58 flow. Second operand 3 states and 55 transitions. [2024-11-12 16:00:00,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 102 flow [2024-11-12 16:00:00,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:00:00,190 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 71 flow [2024-11-12 16:00:00,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2024-11-12 16:00:00,193 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-11-12 16:00:00,194 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 71 flow [2024-11-12 16:00:00,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:00,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:00,194 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:00:00,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:00:00,195 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:00:00,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash 282500254, now seen corresponding path program 1 times [2024-11-12 16:00:00,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:00,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547117167] [2024-11-12 16:00:00,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:00,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:00,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547117167] [2024-11-12 16:00:00,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547117167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:00,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998853436] [2024-11-12 16:00:00,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:00,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:00,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:00,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:00,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:00:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:00,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:00:00,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:00,585 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:00:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:00,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998853436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:00:00,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:00:00,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-11-12 16:00:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261379649] [2024-11-12 16:00:00,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:00:00,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:00:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:00:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:00:00,708 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-11-12 16:00:00,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 71 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:00,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:00,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-11-12 16:00:00,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:00,889 INFO L124 PetriNetUnfolderBase]: 24/89 cut-off events. [2024-11-12 16:00:00,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:00:00,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 89 events. 24/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 197 event pairs, 18 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 166. Up to 60 conditions per place. [2024-11-12 16:00:00,893 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 21 selfloop transitions, 7 changer transitions 0/36 dead transitions. [2024-11-12 16:00:00,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 155 flow [2024-11-12 16:00:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:00:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:00:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-11-12 16:00:00,896 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-11-12 16:00:00,896 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 71 flow. Second operand 6 states and 98 transitions. [2024-11-12 16:00:00,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 155 flow [2024-11-12 16:00:00,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:00:00,900 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 121 flow [2024-11-12 16:00:00,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-11-12 16:00:00,902 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2024-11-12 16:00:00,902 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 121 flow [2024-11-12 16:00:00,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:00,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:00,903 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-12 16:00:00,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:00:01,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:01,108 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:00:01,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:01,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1778926289, now seen corresponding path program 2 times [2024-11-12 16:00:01,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:01,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771999378] [2024-11-12 16:00:01,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:01,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771999378] [2024-11-12 16:00:01,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771999378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149951833] [2024-11-12 16:00:01,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:00:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:01,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:01,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:01,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:00:01,470 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:00:01,471 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:00:01,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:00:01,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:01,719 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:00:01,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149951833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:01,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:00:01,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-12 16:00:01,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521122701] [2024-11-12 16:00:01,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:01,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:00:01,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:01,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:00:01,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:00:01,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-11-12 16:00:01,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 121 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:01,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:01,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-11-12 16:00:01,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:01,864 INFO L124 PetriNetUnfolderBase]: 24/88 cut-off events. [2024-11-12 16:00:01,864 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-12 16:00:01,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 88 events. 24/88 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 196 event pairs, 18 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 175. Up to 56 conditions per place. [2024-11-12 16:00:01,865 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 17 selfloop transitions, 10 changer transitions 0/35 dead transitions. [2024-11-12 16:00:01,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 173 flow [2024-11-12 16:00:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:00:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:00:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-11-12 16:00:01,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2024-11-12 16:00:01,868 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 121 flow. Second operand 8 states and 116 transitions. [2024-11-12 16:00:01,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 173 flow [2024-11-12 16:00:01,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 147 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-12 16:00:01,870 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 113 flow [2024-11-12 16:00:01,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-11-12 16:00:01,871 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2024-11-12 16:00:01,871 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 113 flow [2024-11-12 16:00:01,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:01,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:01,872 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-11-12 16:00:01,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 16:00:02,076 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,SelfDestructingSolverStorable3 [2024-11-12 16:00:02,077 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:00:02,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1753973236, now seen corresponding path program 1 times [2024-11-12 16:00:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:02,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206876188] [2024-11-12 16:00:02,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:02,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206876188] [2024-11-12 16:00:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206876188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353433911] [2024-11-12 16:00:02,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:02,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:02,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:02,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:02,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:00:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:02,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-12 16:00:02,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:02,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:00:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353433911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:00:02,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:00:02,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-12 16:00:02,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402977531] [2024-11-12 16:00:02,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:00:02,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 16:00:02,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 16:00:02,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:00:02,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-11-12 16:00:02,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 113 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:02,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:02,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-11-12 16:00:02,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:02,315 INFO L124 PetriNetUnfolderBase]: 22/89 cut-off events. [2024-11-12 16:00:02,315 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:00:02,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 89 events. 22/89 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 172 event pairs, 18 based on Foata normal form. 4/93 useless extension candidates. Maximal degree in co-relation 181. Up to 55 conditions per place. [2024-11-12 16:00:02,317 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 20 selfloop transitions, 8 changer transitions 0/36 dead transitions. [2024-11-12 16:00:02,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 36 transitions, 186 flow [2024-11-12 16:00:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:00:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:00:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-11-12 16:00:02,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-12 16:00:02,319 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 113 flow. Second operand 8 states and 128 transitions. [2024-11-12 16:00:02,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 36 transitions, 186 flow [2024-11-12 16:00:02,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 168 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-12 16:00:02,320 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 125 flow [2024-11-12 16:00:02,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2024-11-12 16:00:02,322 INFO L279 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2024-11-12 16:00:02,322 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 125 flow [2024-11-12 16:00:02,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:02,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:02,322 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1] [2024-11-12 16:00:02,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:00:02,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:02,523 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2024-11-12 16:00:02,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1430131448, now seen corresponding path program 2 times [2024-11-12 16:00:02,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:02,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528683387] [2024-11-12 16:00:02,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:02,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:00:02,566 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:00:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:00:02,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:00:02,620 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:00:02,621 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-11-12 16:00:02,623 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2024-11-12 16:00:02,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2024-11-12 16:00:02,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2024-11-12 16:00:02,625 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2024-11-12 16:00:02,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2024-11-12 16:00:02,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2024-11-12 16:00:02,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2024-11-12 16:00:02,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2024-11-12 16:00:02,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2024-11-12 16:00:02,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:00:02,627 INFO L421 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-11-12 16:00:02,633 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:00:02,634 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-12 16:00:02,655 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:00:02,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 122 flow [2024-11-12 16:00:02,665 INFO L124 PetriNetUnfolderBase]: 7/65 cut-off events. [2024-11-12 16:00:02,665 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:00:02,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 65 events. 7/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 144 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-11-12 16:00:02,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 56 transitions, 122 flow [2024-11-12 16:00:02,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 56 transitions, 122 flow [2024-11-12 16:00:02,668 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:00:02,669 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;@1af33aab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:00:02,669 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-12 16:00:02,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:00:02,671 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:00:02,671 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:00:02,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:02,671 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:00:02,671 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-12 16:00:02,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash 349562, now seen corresponding path program 1 times [2024-11-12 16:00:02,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:02,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219538061] [2024-11-12 16:00:02,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:02,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:02,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219538061] [2024-11-12 16:00:02,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219538061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:02,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:02,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:00:02,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224366451] [2024-11-12 16:00:02,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:02,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:00:02,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:00:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:00:02,719 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 56 [2024-11-12 16:00:02,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:02,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:02,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 56 [2024-11-12 16:00:02,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:02,898 INFO L124 PetriNetUnfolderBase]: 532/1126 cut-off events. [2024-11-12 16:00:02,898 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-12 16:00:02,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2028 conditions, 1126 events. 532/1126 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6122 event pairs, 468 based on Foata normal form. 123/1233 useless extension candidates. Maximal degree in co-relation 1291. Up to 866 conditions per place. [2024-11-12 16:00:02,912 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 27 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2024-11-12 16:00:02,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 154 flow [2024-11-12 16:00:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:00:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:00:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-11-12 16:00:02,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-11-12 16:00:02,915 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 122 flow. Second operand 3 states and 87 transitions. [2024-11-12 16:00:02,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 154 flow [2024-11-12 16:00:02,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:00:02,918 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 100 flow [2024-11-12 16:00:02,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-11-12 16:00:02,919 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2024-11-12 16:00:02,919 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 100 flow [2024-11-12 16:00:02,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:02,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:02,921 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:00:02,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:00:02,922 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-12 16:00:02,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash 349563, now seen corresponding path program 1 times [2024-11-12 16:00:02,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:02,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316203743] [2024-11-12 16:00:02,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:02,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:02,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:02,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316203743] [2024-11-12 16:00:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316203743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:02,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:02,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:00:02,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208107349] [2024-11-12 16:00:02,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:02,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:00:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:02,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:00:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:00:02,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-12 16:00:02,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:02,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:02,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-12 16:00:02,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:03,161 INFO L124 PetriNetUnfolderBase]: 532/1128 cut-off events. [2024-11-12 16:00:03,162 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-12 16:00:03,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 1128 events. 532/1128 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6120 event pairs, 468 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 2027. Up to 868 conditions per place. [2024-11-12 16:00:03,168 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-12 16:00:03,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 166 flow [2024-11-12 16:00:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:00:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:00:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-12 16:00:03,170 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-12 16:00:03,170 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 100 flow. Second operand 3 states and 90 transitions. [2024-11-12 16:00:03,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 166 flow [2024-11-12 16:00:03,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:00:03,171 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 113 flow [2024-11-12 16:00:03,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-11-12 16:00:03,172 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-12 16:00:03,173 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 113 flow [2024-11-12 16:00:03,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:03,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:03,173 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:00:03,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:00:03,173 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-12 16:00:03,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash 335941334, now seen corresponding path program 1 times [2024-11-12 16:00:03,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:03,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511156809] [2024-11-12 16:00:03,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:03,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:03,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:03,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511156809] [2024-11-12 16:00:03,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511156809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:03,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056146013] [2024-11-12 16:00:03,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:03,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:03,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:03,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:00:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:03,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:00:03,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:03,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:00:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:03,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056146013] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:00:03,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:00:03,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-11-12 16:00:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649858686] [2024-11-12 16:00:03,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:00:03,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:00:03,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:00:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:00:03,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-12 16:00:03,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 113 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:03,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:03,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-12 16:00:03,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:03,715 INFO L124 PetriNetUnfolderBase]: 534/1136 cut-off events. [2024-11-12 16:00:03,715 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-12 16:00:03,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 1136 events. 534/1136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6179 event pairs, 468 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 2053. Up to 870 conditions per place. [2024-11-12 16:00:03,722 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 32 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-11-12 16:00:03,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 219 flow [2024-11-12 16:00:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:00:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:00:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-11-12 16:00:03,724 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-11-12 16:00:03,724 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 113 flow. Second operand 6 states and 157 transitions. [2024-11-12 16:00:03,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 219 flow [2024-11-12 16:00:03,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:00:03,726 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 163 flow [2024-11-12 16:00:03,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-11-12 16:00:03,728 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-11-12 16:00:03,729 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 163 flow [2024-11-12 16:00:03,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:03,730 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:03,730 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-12 16:00:03,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:00:03,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:03,931 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-12 16:00:03,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1251640729, now seen corresponding path program 2 times [2024-11-12 16:00:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:03,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618260627] [2024-11-12 16:00:03,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:04,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:04,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618260627] [2024-11-12 16:00:04,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618260627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:04,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795210016] [2024-11-12 16:00:04,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:00:04,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:04,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:04,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:04,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:00:04,222 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:00:04,222 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:00:04,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:00:04,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:04,412 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:00:04,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795210016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:04,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:00:04,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-12 16:00:04,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175674182] [2024-11-12 16:00:04,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:04,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:00:04,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:00:04,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:00:04,457 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-12 16:00:04,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 163 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 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) [2024-11-12 16:00:04,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:04,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-12 16:00:04,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:04,652 INFO L124 PetriNetUnfolderBase]: 534/1135 cut-off events. [2024-11-12 16:00:04,653 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-12 16:00:04,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1135 events. 534/1135 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6131 event pairs, 468 based on Foata normal form. 1/1121 useless extension candidates. Maximal degree in co-relation 2062. Up to 866 conditions per place. [2024-11-12 16:00:04,660 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 28 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-11-12 16:00:04,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 237 flow [2024-11-12 16:00:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:00:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:00:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-11-12 16:00:04,662 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4263392857142857 [2024-11-12 16:00:04,662 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 163 flow. Second operand 8 states and 191 transitions. [2024-11-12 16:00:04,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 237 flow [2024-11-12 16:00:04,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 211 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-12 16:00:04,664 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 155 flow [2024-11-12 16:00:04,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=155, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-11-12 16:00:04,667 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-12 16:00:04,667 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 155 flow [2024-11-12 16:00:04,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 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) [2024-11-12 16:00:04,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:04,667 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:00:04,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:00:04,868 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,SelfDestructingSolverStorable9 [2024-11-12 16:00:04,868 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-12 16:00:04,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:04,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1226014631, now seen corresponding path program 1 times [2024-11-12 16:00:04,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:04,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847593145] [2024-11-12 16:00:04,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:04,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:04,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:04,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847593145] [2024-11-12 16:00:04,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847593145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:04,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33013791] [2024-11-12 16:00:04,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:04,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:04,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:04,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:04,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:00:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:05,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-12 16:00:05,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:05,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:00:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:05,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33013791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:00:05,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:00:05,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-12 16:00:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507489432] [2024-11-12 16:00:05,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:00:05,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 16:00:05,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:05,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 16:00:05,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:00:05,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-11-12 16:00:05,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 155 flow. Second operand has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:05,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:05,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-11-12 16:00:05,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:05,226 INFO L124 PetriNetUnfolderBase]: 532/1136 cut-off events. [2024-11-12 16:00:05,226 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-12 16:00:05,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2080 conditions, 1136 events. 532/1136 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6117 event pairs, 468 based on Foata normal form. 4/1125 useless extension candidates. Maximal degree in co-relation 2068. Up to 865 conditions per place. [2024-11-12 16:00:05,234 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 31 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-11-12 16:00:05,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 250 flow [2024-11-12 16:00:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:00:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:00:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-11-12 16:00:05,236 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-12 16:00:05,236 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 155 flow. Second operand 8 states and 203 transitions. [2024-11-12 16:00:05,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 250 flow [2024-11-12 16:00:05,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 232 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-12 16:00:05,238 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 167 flow [2024-11-12 16:00:05,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=167, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-11-12 16:00:05,239 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-11-12 16:00:05,239 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 167 flow [2024-11-12 16:00:05,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:05,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:05,240 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:00:05,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:00:05,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:05,440 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-12 16:00:05,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1526659397, now seen corresponding path program 2 times [2024-11-12 16:00:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:05,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893981834] [2024-11-12 16:00:05,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:05,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-12 16:00:05,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:05,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893981834] [2024-11-12 16:00:05,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893981834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:05,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:05,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:00:05,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604176032] [2024-11-12 16:00:05,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:05,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:00:05,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:05,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:00:05,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:00:05,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-12 16:00:05,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:05,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:05,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-12 16:00:05,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:05,967 INFO L124 PetriNetUnfolderBase]: 1009/2083 cut-off events. [2024-11-12 16:00:05,968 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-12 16:00:05,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 2083 events. 1009/2083 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 12212 event pairs, 168 based on Foata normal form. 33/2080 useless extension candidates. Maximal degree in co-relation 3822. Up to 688 conditions per place. [2024-11-12 16:00:05,978 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 65 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2024-11-12 16:00:05,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 385 flow [2024-11-12 16:00:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:00:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:00:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-12 16:00:05,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-12 16:00:05,980 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 167 flow. Second operand 5 states and 160 transitions. [2024-11-12 16:00:05,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 385 flow [2024-11-12 16:00:05,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 377 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:00:05,982 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 186 flow [2024-11-12 16:00:05,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-11-12 16:00:05,983 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-11-12 16:00:05,983 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 186 flow [2024-11-12 16:00:05,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:05,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:05,984 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1] [2024-11-12 16:00:05,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:00:05,984 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2024-11-12 16:00:05,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash -110718274, now seen corresponding path program 1 times [2024-11-12 16:00:05,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:05,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595180226] [2024-11-12 16:00:05,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:05,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:00:06,008 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:00:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:00:06,029 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:00:06,029 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:00:06,030 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-11-12 16:00:06,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2024-11-12 16:00:06,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2024-11-12 16:00:06,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2024-11-12 16:00:06,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2024-11-12 16:00:06,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2024-11-12 16:00:06,030 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2024-11-12 16:00:06,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2024-11-12 16:00:06,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2024-11-12 16:00:06,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2024-11-12 16:00:06,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2024-11-12 16:00:06,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2024-11-12 16:00:06,031 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2024-11-12 16:00:06,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:00:06,032 INFO L421 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-12 16:00:06,032 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:00:06,032 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-12 16:00:06,059 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:00:06,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2024-11-12 16:00:06,067 INFO L124 PetriNetUnfolderBase]: 10/92 cut-off events. [2024-11-12 16:00:06,068 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-12 16:00:06,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 10/92 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 260 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2024-11-12 16:00:06,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 174 flow [2024-11-12 16:00:06,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 174 flow [2024-11-12 16:00:06,070 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:00:06,071 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;@1af33aab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:00:06,071 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-11-12 16:00:06,072 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:00:06,072 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:00:06,072 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:00:06,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:06,073 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:00:06,073 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-12 16:00:06,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:06,073 INFO L85 PathProgramCache]: Analyzing trace with hash 427016, now seen corresponding path program 1 times [2024-11-12 16:00:06,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:06,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028713799] [2024-11-12 16:00:06,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:06,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:06,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:06,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028713799] [2024-11-12 16:00:06,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028713799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:06,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:06,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:00:06,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263619137] [2024-11-12 16:00:06,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:06,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:00:06,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:00:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:00:06,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 78 [2024-11-12 16:00:06,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:06,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:06,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 78 [2024-11-12 16:00:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:07,455 INFO L124 PetriNetUnfolderBase]: 8632/14642 cut-off events. [2024-11-12 16:00:07,456 INFO L125 PetriNetUnfolderBase]: For 684/684 co-relation queries the response was YES. [2024-11-12 16:00:07,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 14642 events. 8632/14642 cut-off events. For 684/684 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107057 event pairs, 7668 based on Foata normal form. 1878/16290 useless extension candidates. Maximal degree in co-relation 8570. Up to 11966 conditions per place. [2024-11-12 16:00:07,574 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 38 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2024-11-12 16:00:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 220 flow [2024-11-12 16:00:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:00:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:00:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-12 16:00:07,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-11-12 16:00:07,576 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 174 flow. Second operand 3 states and 122 transitions. [2024-11-12 16:00:07,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 220 flow [2024-11-12 16:00:07,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 218 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-12 16:00:07,579 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 142 flow [2024-11-12 16:00:07,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-11-12 16:00:07,580 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, -8 predicate places. [2024-11-12 16:00:07,580 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 142 flow [2024-11-12 16:00:07,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:07,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:07,580 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:00:07,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-12 16:00:07,581 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-12 16:00:07,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash 427017, now seen corresponding path program 1 times [2024-11-12 16:00:07,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:07,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936610488] [2024-11-12 16:00:07,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:07,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:07,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:07,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936610488] [2024-11-12 16:00:07,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936610488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:07,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:07,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:00:07,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315157830] [2024-11-12 16:00:07,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:07,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:00:07,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:07,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:00:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:00:07,635 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-11-12 16:00:07,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:07,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:07,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-11-12 16:00:07,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:08,879 INFO L124 PetriNetUnfolderBase]: 8632/14644 cut-off events. [2024-11-12 16:00:08,879 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-11-12 16:00:08,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26952 conditions, 14644 events. 8632/14644 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107025 event pairs, 7668 based on Foata normal form. 0/14413 useless extension candidates. Maximal degree in co-relation 26943. Up to 11968 conditions per place. [2024-11-12 16:00:08,984 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 40 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-11-12 16:00:08,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 230 flow [2024-11-12 16:00:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:00:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:00:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-12 16:00:08,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-11-12 16:00:08,986 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 142 flow. Second operand 3 states and 125 transitions. [2024-11-12 16:00:08,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 230 flow [2024-11-12 16:00:08,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:00:08,989 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 155 flow [2024-11-12 16:00:08,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-11-12 16:00:08,989 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2024-11-12 16:00:08,990 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 155 flow [2024-11-12 16:00:08,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:08,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:08,990 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:00:08,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:00:08,991 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-12 16:00:08,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash 410377124, now seen corresponding path program 1 times [2024-11-12 16:00:08,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:08,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482484757] [2024-11-12 16:00:08,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:08,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:09,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:09,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482484757] [2024-11-12 16:00:09,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482484757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:09,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976329480] [2024-11-12 16:00:09,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:09,062 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:09,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:00:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:09,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:00:09,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:09,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:00:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:09,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976329480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:00:09,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:00:09,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-11-12 16:00:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223098334] [2024-11-12 16:00:09,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:00:09,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:00:09,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:00:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:00:09,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-11-12 16:00:09,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 155 flow. Second operand has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:09,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:09,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-11-12 16:00:09,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:10,744 INFO L124 PetriNetUnfolderBase]: 8634/14652 cut-off events. [2024-11-12 16:00:10,745 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-11-12 16:00:10,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26980 conditions, 14652 events. 8634/14652 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107045 event pairs, 7668 based on Foata normal form. 1/14423 useless extension candidates. Maximal degree in co-relation 26969. Up to 11970 conditions per place. [2024-11-12 16:00:10,848 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 43 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-12 16:00:10,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 283 flow [2024-11-12 16:00:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:00:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:00:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-12 16:00:10,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-11-12 16:00:10,851 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 155 flow. Second operand 6 states and 216 transitions. [2024-11-12 16:00:10,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 283 flow [2024-11-12 16:00:10,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:00:10,854 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 205 flow [2024-11-12 16:00:10,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-11-12 16:00:10,855 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2024-11-12 16:00:10,856 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 205 flow [2024-11-12 16:00:10,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:10,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:10,856 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-12 16:00:10,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-12 16:00:11,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:11,062 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-12 16:00:11,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:11,063 INFO L85 PathProgramCache]: Analyzing trace with hash -57032203, now seen corresponding path program 2 times [2024-11-12 16:00:11,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:11,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177891566] [2024-11-12 16:00:11,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:11,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:11,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:11,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177891566] [2024-11-12 16:00:11,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177891566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:11,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252073453] [2024-11-12 16:00:11,244 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:00:11,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:11,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:11,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:11,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:00:11,337 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:00:11,337 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:00:11,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:00:11,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:11,515 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:00:11,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252073453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:11,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:00:11,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-12 16:00:11,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223238739] [2024-11-12 16:00:11,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:11,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:00:11,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:00:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:00:11,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-11-12 16:00:11,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 28.375) internal successors, (227), 8 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:11,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:11,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-11-12 16:00:11,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:12,790 INFO L124 PetriNetUnfolderBase]: 8634/14651 cut-off events. [2024-11-12 16:00:12,790 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-11-12 16:00:12,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26993 conditions, 14651 events. 8634/14651 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107067 event pairs, 7668 based on Foata normal form. 1/14423 useless extension candidates. Maximal degree in co-relation 26978. Up to 11966 conditions per place. [2024-11-12 16:00:12,909 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 39 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-11-12 16:00:12,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 301 flow [2024-11-12 16:00:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:00:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:00:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 266 transitions. [2024-11-12 16:00:12,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2024-11-12 16:00:12,912 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 205 flow. Second operand 8 states and 266 transitions. [2024-11-12 16:00:12,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 301 flow [2024-11-12 16:00:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 275 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-12 16:00:12,915 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 197 flow [2024-11-12 16:00:12,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-11-12 16:00:12,916 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2024-11-12 16:00:12,917 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 197 flow [2024-11-12 16:00:12,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.375) internal successors, (227), 8 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:12,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:12,917 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:00:12,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:00:13,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 16:00:13,122 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-12 16:00:13,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash -30780494, now seen corresponding path program 1 times [2024-11-12 16:00:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:13,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108381950] [2024-11-12 16:00:13,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:13,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:13,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:13,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108381950] [2024-11-12 16:00:13,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108381950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:00:13,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509403515] [2024-11-12 16:00:13,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:13,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:00:13,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:00:13,185 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:00:13,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:00:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:13,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-12 16:00:13,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:00:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:13,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:00:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:13,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509403515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:00:13,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:00:13,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-12 16:00:13,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568318400] [2024-11-12 16:00:13,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:00:13,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 16:00:13,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:13,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 16:00:13,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:00:13,325 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 78 [2024-11-12 16:00:13,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 197 flow. Second operand has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:13,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:13,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 78 [2024-11-12 16:00:13,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:14,449 INFO L124 PetriNetUnfolderBase]: 8632/14652 cut-off events. [2024-11-12 16:00:14,449 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2024-11-12 16:00:14,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26997 conditions, 14652 events. 8632/14652 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 107148 event pairs, 7668 based on Foata normal form. 4/14427 useless extension candidates. Maximal degree in co-relation 26984. Up to 11965 conditions per place. [2024-11-12 16:00:14,548 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 42 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-11-12 16:00:14,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 314 flow [2024-11-12 16:00:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:00:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:00:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 278 transitions. [2024-11-12 16:00:14,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-11-12 16:00:14,550 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 197 flow. Second operand 8 states and 278 transitions. [2024-11-12 16:00:14,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 314 flow [2024-11-12 16:00:14,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 296 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-12 16:00:14,554 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 209 flow [2024-11-12 16:00:14,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-11-12 16:00:14,555 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2024-11-12 16:00:14,555 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 209 flow [2024-11-12 16:00:14,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:14,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:14,556 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:00:14,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:00:14,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 16:00:14,756 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-12 16:00:14,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1253644898, now seen corresponding path program 2 times [2024-11-12 16:00:14,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:14,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742820158] [2024-11-12 16:00:14,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:14,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-12 16:00:15,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742820158] [2024-11-12 16:00:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742820158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:15,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:15,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:00:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041892981] [2024-11-12 16:00:15,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:15,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:00:15,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:15,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:00:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:00:15,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-11-12 16:00:15,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:15,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:15,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-11-12 16:00:15,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:17,159 INFO L124 PetriNetUnfolderBase]: 16399/27293 cut-off events. [2024-11-12 16:00:17,159 INFO L125 PetriNetUnfolderBase]: For 658/658 co-relation queries the response was YES. [2024-11-12 16:00:17,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50707 conditions, 27293 events. 16399/27293 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 207751 event pairs, 5643 based on Foata normal form. 333/27049 useless extension candidates. Maximal degree in co-relation 50692. Up to 9568 conditions per place. [2024-11-12 16:00:17,325 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 98 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2024-11-12 16:00:17,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 124 transitions, 547 flow [2024-11-12 16:00:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:00:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:00:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-11-12 16:00:17,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5974358974358974 [2024-11-12 16:00:17,327 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 209 flow. Second operand 5 states and 233 transitions. [2024-11-12 16:00:17,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 124 transitions, 547 flow [2024-11-12 16:00:17,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 539 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:00:17,331 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 228 flow [2024-11-12 16:00:17,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2024-11-12 16:00:17,331 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 9 predicate places. [2024-11-12 16:00:17,331 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 228 flow [2024-11-12 16:00:17,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:17,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:17,332 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:00:17,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-12 16:00:17,332 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-12 16:00:17,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash 289104072, now seen corresponding path program 1 times [2024-11-12 16:00:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:17,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355888971] [2024-11-12 16:00:17,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:17,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-12 16:00:17,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:17,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355888971] [2024-11-12 16:00:17,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355888971] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:17,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:17,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:00:17,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314220865] [2024-11-12 16:00:17,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:17,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:00:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:00:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:00:17,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 78 [2024-11-12 16:00:17,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 70 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:17,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:17,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 78 [2024-11-12 16:00:17,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:21,381 INFO L124 PetriNetUnfolderBase]: 29468/48957 cut-off events. [2024-11-12 16:00:21,381 INFO L125 PetriNetUnfolderBase]: For 8325/8808 co-relation queries the response was YES. [2024-11-12 16:00:21,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96678 conditions, 48957 events. 29468/48957 cut-off events. For 8325/8808 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 397790 event pairs, 7462 based on Foata normal form. 594/48644 useless extension candidates. Maximal degree in co-relation 96660. Up to 17136 conditions per place. [2024-11-12 16:00:21,740 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 102 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2024-11-12 16:00:21,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 604 flow [2024-11-12 16:00:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:00:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:00:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-11-12 16:00:21,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5923076923076923 [2024-11-12 16:00:21,742 INFO L175 Difference]: Start difference. First operand has 84 places, 70 transitions, 228 flow. Second operand 5 states and 231 transitions. [2024-11-12 16:00:21,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 604 flow [2024-11-12 16:00:21,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 603 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:00:21,754 INFO L231 Difference]: Finished difference. Result has 89 places, 72 transitions, 254 flow [2024-11-12 16:00:21,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=72} [2024-11-12 16:00:21,755 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 14 predicate places. [2024-11-12 16:00:21,755 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 72 transitions, 254 flow [2024-11-12 16:00:21,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:21,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:21,755 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-11-12 16:00:21,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-12 16:00:21,756 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2024-11-12 16:00:21,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash -742635331, now seen corresponding path program 1 times [2024-11-12 16:00:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:21,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321170300] [2024-11-12 16:00:21,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:00:21,777 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 16:00:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 16:00:21,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 16:00:21,794 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 16:00:21,794 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-11-12 16:00:21,794 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2024-11-12 16:00:21,794 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2024-11-12 16:00:21,794 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2024-11-12 16:00:21,795 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-11-12 16:00:21,795 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-11-12 16:00:21,795 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2024-11-12 16:00:21,795 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-11-12 16:00:21,795 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-11-12 16:00:21,796 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2024-11-12 16:00:21,796 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-11-12 16:00:21,796 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-11-12 16:00:21,796 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-11-12 16:00:21,796 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2024-11-12 16:00:21,796 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2024-11-12 16:00:21,797 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-11-12 16:00:21,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-12 16:00:21,797 INFO L421 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-11-12 16:00:21,798 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-12 16:00:21,798 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-12 16:00:21,832 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:00:21,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 100 transitions, 228 flow [2024-11-12 16:00:21,846 INFO L124 PetriNetUnfolderBase]: 13/119 cut-off events. [2024-11-12 16:00:21,847 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-12 16:00:21,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 119 events. 13/119 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 380 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 100. Up to 5 conditions per place. [2024-11-12 16:00:21,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 100 transitions, 228 flow [2024-11-12 16:00:21,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 100 transitions, 228 flow [2024-11-12 16:00:21,850 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:00:21,851 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;@1af33aab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:00:21,851 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-12 16:00:21,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:00:21,853 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:00:21,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:00:21,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:21,853 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:00:21,853 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-11-12 16:00:21,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash 526316, now seen corresponding path program 1 times [2024-11-12 16:00:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260651711] [2024-11-12 16:00:21,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:21,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:21,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:21,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260651711] [2024-11-12 16:00:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260651711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:21,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:21,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:00:21,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902196551] [2024-11-12 16:00:21,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:21,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:00:21,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:00:21,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:00:21,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2024-11-12 16:00:21,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 100 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:21,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:21,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2024-11-12 16:00:21,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:00:34,899 INFO L124 PetriNetUnfolderBase]: 119632/179858 cut-off events. [2024-11-12 16:00:34,899 INFO L125 PetriNetUnfolderBase]: For 11956/11956 co-relation queries the response was YES. [2024-11-12 16:00:35,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338262 conditions, 179858 events. 119632/179858 cut-off events. For 11956/11956 co-relation queries the response was YES. Maximal size of possible extension queue 4931. Compared 1519511 event pairs, 106668 based on Foata normal form. 25424/202901 useless extension candidates. Maximal degree in co-relation 27148. Up to 152966 conditions per place. [2024-11-12 16:00:36,045 INFO L140 encePairwiseOnDemand]: 85/100 looper letters, 49 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2024-11-12 16:00:36,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 288 flow [2024-11-12 16:00:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:00:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:00:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-12 16:00:36,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5233333333333333 [2024-11-12 16:00:36,047 INFO L175 Difference]: Start difference. First operand has 96 places, 100 transitions, 228 flow. Second operand 3 states and 157 transitions. [2024-11-12 16:00:36,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 288 flow [2024-11-12 16:00:36,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 282 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-12 16:00:36,054 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 184 flow [2024-11-12 16:00:36,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2024-11-12 16:00:36,054 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -10 predicate places. [2024-11-12 16:00:36,055 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 184 flow [2024-11-12 16:00:36,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:36,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:00:36,055 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:00:36,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-12 16:00:36,055 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2024-11-12 16:00:36,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:00:36,056 INFO L85 PathProgramCache]: Analyzing trace with hash 526317, now seen corresponding path program 1 times [2024-11-12 16:00:36,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:00:36,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752474410] [2024-11-12 16:00:36,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:00:36,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:00:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:00:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:00:36,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:00:36,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752474410] [2024-11-12 16:00:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752474410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:00:36,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:00:36,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:00:36,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845844434] [2024-11-12 16:00:36,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:00:36,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:00:36,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:00:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:00:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:00:36,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 100 [2024-11-12 16:00:36,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:00:36,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:00:36,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 100 [2024-11-12 16:00:36,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand