./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:50:38,580 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:50:38,636 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:50:38,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:50:38,642 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:50:38,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:50:38,663 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:50:38,663 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:50:38,663 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:50:38,670 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:50:38,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:50:38,671 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:50:38,671 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:50:38,671 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:50:38,671 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:50:38,672 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:50:38,672 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:50:38,672 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:50:38,672 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:50:38,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:50:38,672 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:50:38,673 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:50:38,673 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:50:38,673 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:50:38,674 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:50:38,674 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:50:38,674 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:50:38,674 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:50:38,674 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:50:38,674 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:50:38,674 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:50:38,675 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:50:38,675 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:50:38,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:50:38,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:50:38,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:50:38,675 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:50:38,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:50:38,676 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:50:38,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:50:38,676 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:50:38,678 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:50:38,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 [2024-11-19 09:50:38,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:50:38,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:50:38,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:50:38,942 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:50:38,942 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:50:38,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-19 09:50:40,279 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:50:40,444 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:50:40,444 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-19 09:50:40,451 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9243d34/0eb601fb792a40e384a79795b002ccae/FLAG1eb6f650a [2024-11-19 09:50:40,465 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9243d34/0eb601fb792a40e384a79795b002ccae [2024-11-19 09:50:40,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:50:40,468 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:50:40,471 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:50:40,471 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:50:40,476 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:50:40,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68965b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40, skipping insertion in model container [2024-11-19 09:50:40,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,495 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:50:40,694 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:50:40,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:50:40,704 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:50:40,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:50:40,739 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:50:40,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40 WrapperNode [2024-11-19 09:50:40,740 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:50:40,741 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:50:40,741 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:50:40,741 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:50:40,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,784 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 186 [2024-11-19 09:50:40,785 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:50:40,785 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:50:40,785 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:50:40,785 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:50:40,798 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,804 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,823 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:50:40,823 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,838 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:50:40,847 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:50:40,847 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:50:40,847 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:50:40,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (1/1) ... [2024-11-19 09:50:40,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:50:40,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:40,882 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) [2024-11-19 09:50:40,891 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 [2024-11-19 09:50:40,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:50:40,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:50:40,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:50:40,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:50:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:50:40,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:50:40,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:50:40,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:50:40,948 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:50:41,035 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:50:41,037 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:50:41,290 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:50:41,291 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:50:41,477 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:50:41,477 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:50:41,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:50:41 BoogieIcfgContainer [2024-11-19 09:50:41,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:50:41,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:50:41,479 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:50:41,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:50:41,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:50:40" (1/3) ... [2024-11-19 09:50:41,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e148e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:50:41, skipping insertion in model container [2024-11-19 09:50:41,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:50:40" (2/3) ... [2024-11-19 09:50:41,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e148e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:50:41, skipping insertion in model container [2024-11-19 09:50:41,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:50:41" (3/3) ... [2024-11-19 09:50:41,485 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2024-11-19 09:50:41,497 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:50:41,497 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-19 09:50:41,497 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:50:41,560 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:50:41,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 45 transitions, 111 flow [2024-11-19 09:50:41,604 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-11-19 09:50:41,605 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:50:41,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 42 events. 4/42 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-11-19 09:50:41,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 45 transitions, 111 flow [2024-11-19 09:50:41,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 41 transitions, 100 flow [2024-11-19 09:50:41,618 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:50:41,626 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;@4377b505, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:50:41,626 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-19 09:50:41,630 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:50:41,630 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:50:41,630 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:50:41,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:41,631 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:50:41,632 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:41,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash 606795, now seen corresponding path program 1 times [2024-11-19 09:50:41,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:41,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031132536] [2024-11-19 09:50:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:41,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:41,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:41,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031132536] [2024-11-19 09:50:41,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031132536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:41,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:41,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:50:41,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428538964] [2024-11-19 09:50:41,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:41,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:50:41,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:50:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:50:41,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:41,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 100 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) [2024-11-19 09:50:41,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:41,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:41,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:42,093 INFO L124 PetriNetUnfolderBase]: 332/548 cut-off events. [2024-11-19 09:50:42,093 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:50:42,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 548 events. 332/548 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2187 event pairs, 226 based on Foata normal form. 1/501 useless extension candidates. Maximal degree in co-relation 933. Up to 481 conditions per place. [2024-11-19 09:50:42,100 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 23 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-19 09:50:42,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 144 flow [2024-11-19 09:50:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:50:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:50:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-11-19 09:50:42,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-19 09:50:42,111 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 100 flow. Second operand 3 states and 78 transitions. [2024-11-19 09:50:42,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 144 flow [2024-11-19 09:50:42,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:50:42,116 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-19 09:50:42,118 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-19 09:50:42,120 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2024-11-19 09:50:42,121 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-19 09:50:42,121 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) [2024-11-19 09:50:42,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:42,121 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:50:42,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:50:42,122 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:42,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash 606796, now seen corresponding path program 1 times [2024-11-19 09:50:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:42,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564859655] [2024-11-19 09:50:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:42,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564859655] [2024-11-19 09:50:42,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564859655] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:42,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:42,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:50:42,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364181741] [2024-11-19 09:50:42,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:42,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:50:42,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:50:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:50:42,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:42,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-11-19 09:50:42,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:42,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:42,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:42,504 INFO L124 PetriNetUnfolderBase]: 333/551 cut-off events. [2024-11-19 09:50:42,504 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:50:42,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 551 events. 333/551 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2191 event pairs, 226 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 1038. Up to 486 conditions per place. [2024-11-19 09:50:42,514 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 25 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-11-19 09:50:42,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 152 flow [2024-11-19 09:50:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:50:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:50:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-19 09:50:42,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-11-19 09:50:42,516 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 4 states and 98 transitions. [2024-11-19 09:50:42,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 152 flow [2024-11-19 09:50:42,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:50:42,549 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 109 flow [2024-11-19 09:50:42,549 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-19 09:50:42,550 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2024-11-19 09:50:42,550 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 109 flow [2024-11-19 09:50:42,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-11-19 09:50:42,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:42,550 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:50:42,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:50:42,550 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:42,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:42,551 INFO L85 PathProgramCache]: Analyzing trace with hash 583150581, now seen corresponding path program 1 times [2024-11-19 09:50:42,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:42,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381884181] [2024-11-19 09:50:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:42,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:42,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:42,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381884181] [2024-11-19 09:50:42,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381884181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:42,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100023924] [2024-11-19 09:50:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:42,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:42,780 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) [2024-11-19 09:50:42,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:50:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:42,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:50:42,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:42,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:50:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:43,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:43,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100023924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:43,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:50:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819817777] [2024-11-19 09:50:43,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:43,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:50:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:50:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:50:43,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:43,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 109 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2024-11-19 09:50:43,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:43,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:43,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:43,463 INFO L124 PetriNetUnfolderBase]: 333/550 cut-off events. [2024-11-19 09:50:43,463 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:50:43,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 550 events. 333/550 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2170 event pairs, 226 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 1045. Up to 482 conditions per place. [2024-11-19 09:50:43,467 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 21 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-11-19 09:50:43,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 161 flow [2024-11-19 09:50:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:50:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:50:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-11-19 09:50:43,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48518518518518516 [2024-11-19 09:50:43,469 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 109 flow. Second operand 6 states and 131 transitions. [2024-11-19 09:50:43,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 161 flow [2024-11-19 09:50:43,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:50:43,470 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 116 flow [2024-11-19 09:50:43,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-11-19 09:50:43,471 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2024-11-19 09:50:43,471 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 116 flow [2024-11-19 09:50:43,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2024-11-19 09:50:43,471 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:43,471 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:50:43,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:50:43,675 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 [2024-11-19 09:50:43,676 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:43,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash 900186448, now seen corresponding path program 1 times [2024-11-19 09:50:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:43,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928828284] [2024-11-19 09:50:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:43,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:43,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928828284] [2024-11-19 09:50:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928828284] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:43,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:43,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:50:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623199035] [2024-11-19 09:50:43,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:43,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:50:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:43,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:50:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:50:43,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-11-19 09:50:43,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:43,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:43,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-11-19 09:50:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:43,820 INFO L124 PetriNetUnfolderBase]: 333/534 cut-off events. [2024-11-19 09:50:43,821 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:50:43,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 534 events. 333/534 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2007 event pairs, 226 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 1030. Up to 481 conditions per place. [2024-11-19 09:50:43,824 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 25 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-19 09:50:43,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 166 flow [2024-11-19 09:50:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:50:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:50:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-11-19 09:50:43,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-19 09:50:43,825 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 116 flow. Second operand 4 states and 84 transitions. [2024-11-19 09:50:43,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 166 flow [2024-11-19 09:50:43,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 136 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-19 09:50:43,827 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 86 flow [2024-11-19 09:50:43,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-19 09:50:43,827 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -8 predicate places. [2024-11-19 09:50:43,827 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 86 flow [2024-11-19 09:50:43,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:43,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:43,828 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:50:43,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:50:43,828 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:43,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash 900186449, now seen corresponding path program 1 times [2024-11-19 09:50:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:43,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595889151] [2024-11-19 09:50:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:43,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:43,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595889151] [2024-11-19 09:50:43,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595889151] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:43,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:43,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:50:43,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11181399] [2024-11-19 09:50:43,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:43,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:50:43,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:50:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:50:43,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:43,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:43,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:43,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:43,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:44,104 INFO L124 PetriNetUnfolderBase]: 719/1157 cut-off events. [2024-11-19 09:50:44,105 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 09:50:44,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263 conditions, 1157 events. 719/1157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5336 event pairs, 452 based on Foata normal form. 0/1075 useless extension candidates. Maximal degree in co-relation 1322. Up to 624 conditions per place. [2024-11-19 09:50:44,112 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 57 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-11-19 09:50:44,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 284 flow [2024-11-19 09:50:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:50:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:50:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-11-19 09:50:44,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-11-19 09:50:44,114 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 86 flow. Second operand 5 states and 148 transitions. [2024-11-19 09:50:44,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 284 flow [2024-11-19 09:50:44,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 70 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:50:44,116 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 107 flow [2024-11-19 09:50:44,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-19 09:50:44,117 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2024-11-19 09:50:44,117 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 107 flow [2024-11-19 09:50:44,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:44,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:44,118 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:44,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:50:44,119 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:44,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:44,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1787792826, now seen corresponding path program 1 times [2024-11-19 09:50:44,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:44,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725324403] [2024-11-19 09:50:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:44,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:44,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725324403] [2024-11-19 09:50:44,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725324403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:44,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:44,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:50:44,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233972488] [2024-11-19 09:50:44,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:44,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:50:44,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:44,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:50:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:50:44,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:44,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:44,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:44,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:44,348 INFO L124 PetriNetUnfolderBase]: 597/981 cut-off events. [2024-11-19 09:50:44,348 INFO L125 PetriNetUnfolderBase]: For 300/350 co-relation queries the response was YES. [2024-11-19 09:50:44,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2155 conditions, 981 events. 597/981 cut-off events. For 300/350 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4247 event pairs, 389 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 1380. Up to 598 conditions per place. [2024-11-19 09:50:44,352 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 52 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-19 09:50:44,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 65 transitions, 289 flow [2024-11-19 09:50:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:50:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:50:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-19 09:50:44,353 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-11-19 09:50:44,353 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 107 flow. Second operand 5 states and 143 transitions. [2024-11-19 09:50:44,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 65 transitions, 289 flow [2024-11-19 09:50:44,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:50:44,356 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 127 flow [2024-11-19 09:50:44,356 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-11-19 09:50:44,358 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2024-11-19 09:50:44,358 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 127 flow [2024-11-19 09:50:44,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:44,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:44,358 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:44,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:50:44,358 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:44,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash -500757752, now seen corresponding path program 1 times [2024-11-19 09:50:44,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:44,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027666757] [2024-11-19 09:50:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:44,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027666757] [2024-11-19 09:50:44,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027666757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137708756] [2024-11-19 09:50:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:44,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:44,504 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) [2024-11-19 09:50:44,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:50:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:44,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:50:44,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:44,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:44,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:50:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:44,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137708756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:44,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:44,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 09:50:44,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927753818] [2024-11-19 09:50:44,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:44,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:50:44,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:50:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:50:44,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:44,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 127 flow. Second operand has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 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) [2024-11-19 09:50:44,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:44,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:44,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:45,050 INFO L124 PetriNetUnfolderBase]: 755/1239 cut-off events. [2024-11-19 09:50:45,050 INFO L125 PetriNetUnfolderBase]: For 566/651 co-relation queries the response was YES. [2024-11-19 09:50:45,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 1239 events. 755/1239 cut-off events. For 566/651 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5937 event pairs, 469 based on Foata normal form. 0/1153 useless extension candidates. Maximal degree in co-relation 2020. Up to 662 conditions per place. [2024-11-19 09:50:45,055 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 55 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-19 09:50:45,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 323 flow [2024-11-19 09:50:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:50:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:50:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-11-19 09:50:45,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-19 09:50:45,057 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 127 flow. Second operand 6 states and 165 transitions. [2024-11-19 09:50:45,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 323 flow [2024-11-19 09:50:45,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:50:45,059 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 151 flow [2024-11-19 09:50:45,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-19 09:50:45,059 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2024-11-19 09:50:45,060 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 151 flow [2024-11-19 09:50:45,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 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) [2024-11-19 09:50:45,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:45,060 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:45,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:50:45,263 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,SelfDestructingSolverStorable6 [2024-11-19 09:50:45,263 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:45,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash -191842740, now seen corresponding path program 1 times [2024-11-19 09:50:45,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:45,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822800231] [2024-11-19 09:50:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:45,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:45,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:45,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822800231] [2024-11-19 09:50:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822800231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006091717] [2024-11-19 09:50:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:45,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:45,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:45,347 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) [2024-11-19 09:50:45,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:50:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:45,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:50:45,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:45,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:45,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006091717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:45,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:45,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:50:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040523668] [2024-11-19 09:50:45,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:45,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:50:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:50:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:50:45,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:45,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 151 flow. Second operand has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 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) [2024-11-19 09:50:45,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:45,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:45,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:45,860 INFO L124 PetriNetUnfolderBase]: 1380/2203 cut-off events. [2024-11-19 09:50:45,861 INFO L125 PetriNetUnfolderBase]: For 1510/1633 co-relation queries the response was YES. [2024-11-19 09:50:45,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5749 conditions, 2203 events. 1380/2203 cut-off events. For 1510/1633 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11168 event pairs, 700 based on Foata normal form. 42/2218 useless extension candidates. Maximal degree in co-relation 2648. Up to 945 conditions per place. [2024-11-19 09:50:45,869 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 76 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2024-11-19 09:50:45,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 97 transitions, 489 flow [2024-11-19 09:50:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:50:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:50:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-11-19 09:50:45,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-11-19 09:50:45,871 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 151 flow. Second operand 8 states and 218 transitions. [2024-11-19 09:50:45,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 97 transitions, 489 flow [2024-11-19 09:50:45,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 97 transitions, 474 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-19 09:50:45,874 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 231 flow [2024-11-19 09:50:45,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=231, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-11-19 09:50:45,874 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2024-11-19 09:50:45,875 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 231 flow [2024-11-19 09:50:45,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 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) [2024-11-19 09:50:45,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:45,875 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:45,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:50:46,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:46,076 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:46,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:46,077 INFO L85 PathProgramCache]: Analyzing trace with hash 62288855, now seen corresponding path program 1 times [2024-11-19 09:50:46,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:46,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872771361] [2024-11-19 09:50:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:46,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:46,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872771361] [2024-11-19 09:50:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872771361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:46,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:46,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:50:46,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370606121] [2024-11-19 09:50:46,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:46,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:50:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:50:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:50:46,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:46,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-19 09:50:46,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:46,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:46,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:46,323 INFO L124 PetriNetUnfolderBase]: 1211/1928 cut-off events. [2024-11-19 09:50:46,324 INFO L125 PetriNetUnfolderBase]: For 4479/4989 co-relation queries the response was YES. [2024-11-19 09:50:46,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5756 conditions, 1928 events. 1211/1928 cut-off events. For 4479/4989 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9499 event pairs, 841 based on Foata normal form. 0/1829 useless extension candidates. Maximal degree in co-relation 3898. Up to 1548 conditions per place. [2024-11-19 09:50:46,332 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 56 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-19 09:50:46,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 421 flow [2024-11-19 09:50:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:50:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:50:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-19 09:50:46,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-11-19 09:50:46,334 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 231 flow. Second operand 5 states and 138 transitions. [2024-11-19 09:50:46,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 421 flow [2024-11-19 09:50:46,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 414 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-19 09:50:46,338 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 249 flow [2024-11-19 09:50:46,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-11-19 09:50:46,339 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 17 predicate places. [2024-11-19 09:50:46,339 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 249 flow [2024-11-19 09:50:46,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-19 09:50:46,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:46,339 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:46,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:50:46,339 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:46,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash -194820687, now seen corresponding path program 1 times [2024-11-19 09:50:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:46,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024301001] [2024-11-19 09:50:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:46,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:46,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024301001] [2024-11-19 09:50:46,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024301001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:46,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499408745] [2024-11-19 09:50:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:46,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:46,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:46,467 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) [2024-11-19 09:50:46,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:50:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:46,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:50:46,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:46,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:46,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:50:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:46,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499408745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:46,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:46,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 09:50:46,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929189481] [2024-11-19 09:50:46,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:46,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:50:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:46,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:50:46,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:50:46,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:46,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 249 flow. Second operand has 11 states, 11 states have (on average 18.818181818181817) internal successors, (207), 11 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:46,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:46,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:46,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:47,187 INFO L124 PetriNetUnfolderBase]: 1767/2892 cut-off events. [2024-11-19 09:50:47,187 INFO L125 PetriNetUnfolderBase]: For 5905/6651 co-relation queries the response was YES. [2024-11-19 09:50:47,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8505 conditions, 2892 events. 1767/2892 cut-off events. For 5905/6651 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16155 event pairs, 736 based on Foata normal form. 0/2731 useless extension candidates. Maximal degree in co-relation 7650. Up to 1370 conditions per place. [2024-11-19 09:50:47,203 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 81 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-11-19 09:50:47,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 649 flow [2024-11-19 09:50:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:50:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:50:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-11-19 09:50:47,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-19 09:50:47,205 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 249 flow. Second operand 7 states and 190 transitions. [2024-11-19 09:50:47,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 649 flow [2024-11-19 09:50:47,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 644 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:50:47,212 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 288 flow [2024-11-19 09:50:47,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-11-19 09:50:47,212 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2024-11-19 09:50:47,212 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 288 flow [2024-11-19 09:50:47,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.818181818181817) internal successors, (207), 11 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:47,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:47,213 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:47,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:50:47,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:47,413 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:47,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:47,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1482050691, now seen corresponding path program 2 times [2024-11-19 09:50:47,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:47,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399028615] [2024-11-19 09:50:47,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:47,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:47,429 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:47,430 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:50:47,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399028615] [2024-11-19 09:50:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399028615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808404728] [2024-11-19 09:50:47,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:47,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:47,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:47,664 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) [2024-11-19 09:50:47,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:50:47,725 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:47,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:47,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:50:47,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:47,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:47,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:50:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:47,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808404728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:47,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:47,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-19 09:50:47,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626491429] [2024-11-19 09:50:47,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:47,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:50:47,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:50:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:50:48,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:50:48,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 288 flow. Second operand has 19 states, 19 states have (on average 17.789473684210527) internal successors, (338), 19 states have internal predecessors, (338), 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) [2024-11-19 09:50:48,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:48,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:50:48,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:49,371 INFO L124 PetriNetUnfolderBase]: 2575/3832 cut-off events. [2024-11-19 09:50:49,371 INFO L125 PetriNetUnfolderBase]: For 7286/7830 co-relation queries the response was YES. [2024-11-19 09:50:49,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13239 conditions, 3832 events. 2575/3832 cut-off events. For 7286/7830 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19783 event pairs, 511 based on Foata normal form. 0/3802 useless extension candidates. Maximal degree in co-relation 7162. Up to 722 conditions per place. [2024-11-19 09:50:49,394 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 166 selfloop transitions, 25 changer transitions 0/198 dead transitions. [2024-11-19 09:50:49,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 198 transitions, 1279 flow [2024-11-19 09:50:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:50:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:50:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 380 transitions. [2024-11-19 09:50:49,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-19 09:50:49,398 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 288 flow. Second operand 14 states and 380 transitions. [2024-11-19 09:50:49,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 198 transitions, 1279 flow [2024-11-19 09:50:49,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 198 transitions, 1248 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-19 09:50:49,407 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 389 flow [2024-11-19 09:50:49,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=389, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2024-11-19 09:50:49,407 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 33 predicate places. [2024-11-19 09:50:49,407 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 389 flow [2024-11-19 09:50:49,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.789473684210527) internal successors, (338), 19 states have internal predecessors, (338), 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) [2024-11-19 09:50:49,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:49,408 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:49,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:50:49,612 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,SelfDestructingSolverStorable10 [2024-11-19 09:50:49,613 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:49,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1736182286, now seen corresponding path program 1 times [2024-11-19 09:50:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:49,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812448999] [2024-11-19 09:50:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:49,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:49,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:49,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812448999] [2024-11-19 09:50:49,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812448999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:49,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490033986] [2024-11-19 09:50:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:49,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:49,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:49,750 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) [2024-11-19 09:50:49,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:50:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:49,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:50:49,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:49,926 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:50:49,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490033986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:49,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:50:49,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-19 09:50:49,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965144518] [2024-11-19 09:50:49,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:49,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:50:49,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:50:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:50:50,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:50:50,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 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) [2024-11-19 09:50:50,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:50,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:50:50,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:50,417 INFO L124 PetriNetUnfolderBase]: 2659/4021 cut-off events. [2024-11-19 09:50:50,417 INFO L125 PetriNetUnfolderBase]: For 15592/16501 co-relation queries the response was YES. [2024-11-19 09:50:50,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15712 conditions, 4021 events. 2659/4021 cut-off events. For 15592/16501 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21255 event pairs, 801 based on Foata normal form. 208/3937 useless extension candidates. Maximal degree in co-relation 10915. Up to 1632 conditions per place. [2024-11-19 09:50:50,446 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 95 selfloop transitions, 10 changer transitions 0/113 dead transitions. [2024-11-19 09:50:50,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 1009 flow [2024-11-19 09:50:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:50:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:50:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-11-19 09:50:50,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-11-19 09:50:50,448 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 389 flow. Second operand 6 states and 143 transitions. [2024-11-19 09:50:50,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 1009 flow [2024-11-19 09:50:50,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 842 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-11-19 09:50:50,463 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 334 flow [2024-11-19 09:50:50,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-11-19 09:50:50,464 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 27 predicate places. [2024-11-19 09:50:50,464 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 334 flow [2024-11-19 09:50:50,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 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) [2024-11-19 09:50:50,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:50,464 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:50,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:50:50,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:50,665 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:50,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:50,666 INFO L85 PathProgramCache]: Analyzing trace with hash -501318250, now seen corresponding path program 1 times [2024-11-19 09:50:50,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:50,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797910780] [2024-11-19 09:50:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:50,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:50,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797910780] [2024-11-19 09:50:50,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797910780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235070388] [2024-11-19 09:50:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:50,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:50,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:50,774 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) [2024-11-19 09:50:50,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:50:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:50,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:50:50,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:50,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:50,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235070388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:50,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:50,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-19 09:50:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562742360] [2024-11-19 09:50:50,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:50,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:50:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:50:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:50:51,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:50:51,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 334 flow. Second operand has 15 states, 15 states have (on average 19.133333333333333) internal successors, (287), 15 states have internal predecessors, (287), 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) [2024-11-19 09:50:51,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:51,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:50:51,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:51,543 INFO L124 PetriNetUnfolderBase]: 2499/3831 cut-off events. [2024-11-19 09:50:51,544 INFO L125 PetriNetUnfolderBase]: For 8322/8821 co-relation queries the response was YES. [2024-11-19 09:50:51,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13366 conditions, 3831 events. 2499/3831 cut-off events. For 8322/8821 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19732 event pairs, 1232 based on Foata normal form. 96/3811 useless extension candidates. Maximal degree in co-relation 8882. Up to 2011 conditions per place. [2024-11-19 09:50:51,563 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 91 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2024-11-19 09:50:51,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 790 flow [2024-11-19 09:50:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:50:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:50:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-11-19 09:50:51,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-11-19 09:50:51,564 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 334 flow. Second operand 8 states and 214 transitions. [2024-11-19 09:50:51,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 790 flow [2024-11-19 09:50:51,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 748 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:50:51,573 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 382 flow [2024-11-19 09:50:51,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=382, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2024-11-19 09:50:51,574 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2024-11-19 09:50:51,575 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 382 flow [2024-11-19 09:50:51,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.133333333333333) internal successors, (287), 15 states have internal predecessors, (287), 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) [2024-11-19 09:50:51,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:51,575 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:51,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:50:51,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:51,775 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:51,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash 540024909, now seen corresponding path program 2 times [2024-11-19 09:50:51,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:51,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763312535] [2024-11-19 09:50:51,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:51,801 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:51,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:50:51,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:51,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763312535] [2024-11-19 09:50:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763312535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:51,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074727631] [2024-11-19 09:50:51,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:51,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:51,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:52,000 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) [2024-11-19 09:50:52,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:50:52,058 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:52,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:52,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:50:52,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:52,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:52,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:50:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:52,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074727631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:52,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:52,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-19 09:50:52,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796920838] [2024-11-19 09:50:52,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:52,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:50:52,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:50:52,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:50:52,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:50:52,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 382 flow. Second operand has 19 states, 19 states have (on average 18.263157894736842) internal successors, (347), 19 states have internal predecessors, (347), 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) [2024-11-19 09:50:52,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:52,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:50:52,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:53,663 INFO L124 PetriNetUnfolderBase]: 3221/4854 cut-off events. [2024-11-19 09:50:53,663 INFO L125 PetriNetUnfolderBase]: For 11513/12130 co-relation queries the response was YES. [2024-11-19 09:50:53,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17331 conditions, 4854 events. 3221/4854 cut-off events. For 11513/12130 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24483 event pairs, 519 based on Foata normal form. 195/4939 useless extension candidates. Maximal degree in co-relation 11339. Up to 804 conditions per place. [2024-11-19 09:50:53,691 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 160 selfloop transitions, 25 changer transitions 0/192 dead transitions. [2024-11-19 09:50:53,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 192 transitions, 1341 flow [2024-11-19 09:50:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:50:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:50:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 367 transitions. [2024-11-19 09:50:53,693 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5825396825396826 [2024-11-19 09:50:53,694 INFO L175 Difference]: Start difference. First operand has 79 places, 64 transitions, 382 flow. Second operand 14 states and 367 transitions. [2024-11-19 09:50:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 192 transitions, 1341 flow [2024-11-19 09:50:53,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 192 transitions, 1325 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-19 09:50:53,709 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 487 flow [2024-11-19 09:50:53,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=487, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-11-19 09:50:53,710 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 42 predicate places. [2024-11-19 09:50:53,710 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 487 flow [2024-11-19 09:50:53,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.263157894736842) internal successors, (347), 19 states have internal predecessors, (347), 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) [2024-11-19 09:50:53,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:53,711 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:53,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:50:53,915 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,SelfDestructingSolverStorable13 [2024-11-19 09:50:53,916 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:53,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1146426108, now seen corresponding path program 1 times [2024-11-19 09:50:53,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:53,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081701421] [2024-11-19 09:50:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:53,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:53,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081701421] [2024-11-19 09:50:53,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081701421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:53,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:53,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:50:53,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298309138] [2024-11-19 09:50:53,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:53,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:50:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:53,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:50:53,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:50:53,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:50:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 487 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:50:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:54,477 INFO L124 PetriNetUnfolderBase]: 4777/7082 cut-off events. [2024-11-19 09:50:54,477 INFO L125 PetriNetUnfolderBase]: For 24224/25110 co-relation queries the response was YES. [2024-11-19 09:50:54,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27163 conditions, 7082 events. 4777/7082 cut-off events. For 24224/25110 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36973 event pairs, 982 based on Foata normal form. 62/6989 useless extension candidates. Maximal degree in co-relation 17739. Up to 5401 conditions per place. [2024-11-19 09:50:54,511 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 80 selfloop transitions, 6 changer transitions 8/102 dead transitions. [2024-11-19 09:50:54,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 102 transitions, 876 flow [2024-11-19 09:50:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:50:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:50:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-19 09:50:54,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-11-19 09:50:54,513 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 487 flow. Second operand 3 states and 95 transitions. [2024-11-19 09:50:54,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 102 transitions, 876 flow [2024-11-19 09:50:54,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 786 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-11-19 09:50:54,532 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 424 flow [2024-11-19 09:50:54,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-11-19 09:50:54,533 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 35 predicate places. [2024-11-19 09:50:54,533 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 424 flow [2024-11-19 09:50:54,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:54,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:54,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:54,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:50:54,533 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:54,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:54,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1305244317, now seen corresponding path program 1 times [2024-11-19 09:50:54,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:54,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331836310] [2024-11-19 09:50:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:54,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:50:54,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:54,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331836310] [2024-11-19 09:50:54,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331836310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:54,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727647588] [2024-11-19 09:50:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:54,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:54,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:54,613 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) [2024-11-19 09:50:54,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:50:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:54,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:50:54,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:50:54,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:50:54,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727647588] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:54,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:50:54,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-19 09:50:54,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93607736] [2024-11-19 09:50:54,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:54,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:50:54,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:54,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:50:54,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:50:54,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:50:54,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:54,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:54,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:50:54,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:55,595 INFO L124 PetriNetUnfolderBase]: 4997/7492 cut-off events. [2024-11-19 09:50:55,595 INFO L125 PetriNetUnfolderBase]: For 21078/21748 co-relation queries the response was YES. [2024-11-19 09:50:55,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28061 conditions, 7492 events. 4997/7492 cut-off events. For 21078/21748 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 42124 event pairs, 958 based on Foata normal form. 80/7001 useless extension candidates. Maximal degree in co-relation 18451. Up to 1937 conditions per place. [2024-11-19 09:50:55,631 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 162 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-11-19 09:50:55,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 193 transitions, 1612 flow [2024-11-19 09:50:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:50:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:50:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-11-19 09:50:55,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2024-11-19 09:50:55,634 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 424 flow. Second operand 9 states and 231 transitions. [2024-11-19 09:50:55,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 193 transitions, 1612 flow [2024-11-19 09:50:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 193 transitions, 1363 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-11-19 09:50:55,675 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 478 flow [2024-11-19 09:50:55,676 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=478, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-11-19 09:50:55,676 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 31 predicate places. [2024-11-19 09:50:55,676 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 478 flow [2024-11-19 09:50:55,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:55,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:55,676 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:55,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:50:55,877 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,SelfDestructingSolverStorable15 [2024-11-19 09:50:55,877 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:55,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:55,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1304915659, now seen corresponding path program 2 times [2024-11-19 09:50:55,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:55,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487019388] [2024-11-19 09:50:55,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:55,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:55,891 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:55,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:50:55,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487019388] [2024-11-19 09:50:55,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487019388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719609868] [2024-11-19 09:50:55,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:55,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:55,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:55,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:50:56,035 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:56,035 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:56,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:50:56,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:50:56,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:50:56,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719609868] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:56,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:50:56,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-19 09:50:56,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110160537] [2024-11-19 09:50:56,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:56,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:50:56,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:56,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:50:56,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:50:56,171 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:50:56,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 478 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:56,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:56,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:50:56,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:56,894 INFO L124 PetriNetUnfolderBase]: 6097/9128 cut-off events. [2024-11-19 09:50:56,895 INFO L125 PetriNetUnfolderBase]: For 18687/19101 co-relation queries the response was YES. [2024-11-19 09:50:56,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31501 conditions, 9128 events. 6097/9128 cut-off events. For 18687/19101 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 51642 event pairs, 949 based on Foata normal form. 137/8953 useless extension candidates. Maximal degree in co-relation 22327. Up to 2171 conditions per place. [2024-11-19 09:50:56,944 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 175 selfloop transitions, 42 changer transitions 0/225 dead transitions. [2024-11-19 09:50:56,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 225 transitions, 1729 flow [2024-11-19 09:50:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:50:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:50:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-11-19 09:50:56,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5530864197530864 [2024-11-19 09:50:56,946 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 478 flow. Second operand 9 states and 224 transitions. [2024-11-19 09:50:56,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 225 transitions, 1729 flow [2024-11-19 09:50:56,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 225 transitions, 1726 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:50:56,982 INFO L231 Difference]: Finished difference. Result has 90 places, 110 transitions, 842 flow [2024-11-19 09:50:56,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=842, PETRI_PLACES=90, PETRI_TRANSITIONS=110} [2024-11-19 09:50:56,983 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 43 predicate places. [2024-11-19 09:50:56,983 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 110 transitions, 842 flow [2024-11-19 09:50:56,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:56,983 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:56,983 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:56,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 09:50:57,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 09:50:57,188 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:57,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:57,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1394146479, now seen corresponding path program 3 times [2024-11-19 09:50:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:57,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852740444] [2024-11-19 09:50:57,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:50:57,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:57,197 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:50:57,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:57,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:57,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852740444] [2024-11-19 09:50:57,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852740444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:57,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666597919] [2024-11-19 09:50:57,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:50:57,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:57,299 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:57,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:50:57,361 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:50:57,362 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:57,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:50:57,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:57,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:50:57,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666597919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:57,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:57,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-19 09:50:57,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990976213] [2024-11-19 09:50:57,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:57,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:50:57,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:57,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:50:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:50:57,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:50:57,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 110 transitions, 842 flow. Second operand has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 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) [2024-11-19 09:50:57,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:57,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:50:57,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:58,698 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([592] L47-->L46-7: Formula: (let ((.cse1 (* |v_thread1Thread1of1ForFork0_~i~0#1_9| 4))) (let ((.cse0 (+ .cse1 v_~A~0.offset_99))) (and (= |v_thread1Thread1of1ForFork0_plus_#res#1_1| (+ (select (select |v_#memory_int#1_66| v_~A~0.base_102) .cse0) v_~res1~0_60)) (not (= (ite (or (<= |v_thread1Thread1of1ForFork0_plus_#res#1_1| 2147483647) (<= |v_thread1Thread1of1ForFork0_plus_#res#1_1| v_~res1~0_60)) 1 0) 0)) (= |v_thread1Thread1of1ForFork0_plus_#res#1_1| v_~res1~0_59) (= (select |v_#valid_134| v_~A~0.base_102) 1) (= |v_thread1Thread1of1ForFork0_~i~0#1_10| (+ |v_thread1Thread1of1ForFork0_~i~0#1_9| 1)) (not (= (ite (or (<= v_~res1~0_60 |v_thread1Thread1of1ForFork0_plus_#res#1_1|) (<= 0 (+ |v_thread1Thread1of1ForFork0_plus_#res#1_1| 2147483648))) 1 0) 0)) (<= 0 (+ v_~res1~0_59 2147483648)) (<= (+ .cse1 v_~A~0.offset_99 4) (select |v_#length_123| v_~A~0.base_102)) (<= 0 .cse0) (<= v_~res1~0_59 2147483647)))) InVars {~res1~0=v_~res1~0_60, ~A~0.base=v_~A~0.base_102, ~A~0.offset=v_~A~0.offset_99, thread1Thread1of1ForFork0_~i~0#1=|v_thread1Thread1of1ForFork0_~i~0#1_9|, #valid=|v_#valid_134|, #length=|v_#length_123|, #memory_int#1=|v_#memory_int#1_66|} OutVars{~res1~0=v_~res1~0_59, ~A~0.base=v_~A~0.base_102, thread1Thread1of1ForFork0_~tmp~0#1=|v_thread1Thread1of1ForFork0_~tmp~0#1_1|, thread1Thread1of1ForFork0_plus_~a#1=|v_thread1Thread1of1ForFork0_plus_~a#1_1|, thread1Thread1of1ForFork0_plus_#in~a#1=|v_thread1Thread1of1ForFork0_plus_#in~a#1_1|, thread1Thread1of1ForFork0_plus_~b#1=|v_thread1Thread1of1ForFork0_plus_~b#1_1|, #memory_int#1=|v_#memory_int#1_66|, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_1|, ~A~0.offset=v_~A~0.offset_99, thread1Thread1of1ForFork0_#t~post3#1=|v_thread1Thread1of1ForFork0_#t~post3#1_1|, thread1Thread1of1ForFork0_~i~0#1=|v_thread1Thread1of1ForFork0_~i~0#1_10|, thread1Thread1of1ForFork0_#t~ret2#1=|v_thread1Thread1of1ForFork0_#t~ret2#1_1|, #valid=|v_#valid_134|, thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1_1|, #length=|v_#length_123|, thread1Thread1of1ForFork0_plus_#in~b#1=|v_thread1Thread1of1ForFork0_plus_#in~b#1_1|, thread1Thread1of1ForFork0_plus_#res#1=|v_thread1Thread1of1ForFork0_plus_#res#1_1|, thread1Thread1of1ForFork0_#t~mem1#1=|v_thread1Thread1of1ForFork0_#t~mem1#1_1|} AuxVars[] AssignedVars[~res1~0, thread1Thread1of1ForFork0_~tmp~0#1, thread1Thread1of1ForFork0_plus_~a#1, thread1Thread1of1ForFork0_plus_#in~a#1, thread1Thread1of1ForFork0_plus_~b#1, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1, thread1Thread1of1ForFork0_#t~post3#1, thread1Thread1of1ForFork0_~i~0#1, thread1Thread1of1ForFork0_#t~ret2#1, thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1, thread1Thread1of1ForFork0_plus_#in~b#1, thread1Thread1of1ForFork0_plus_#res#1, thread1Thread1of1ForFork0_#t~mem1#1][277], [24#L46-7true, Black: 585#(and (or (< ~N~0 2) (< (+ |ULTIMATE.start_create_fresh_int_array_~i~3#1| 1) |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= ~M~0 1) (<= 0 ~M~0) (<= 1 |thread2Thread1of1ForFork1_~i~1#1|)), 109#(= (select |#valid| ~A~0.base) 1), Black: 266#(and (= ~A~0.offset 0) (<= 4 (select |#length| ~A~0.base))), Black: 884#(<= 1 ~N~0), Black: 593#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (= |thread2Thread1of1ForFork1_~i~1#1| 0)), Black: 1027#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0)), Black: 713#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (<= 8 (select |#length| ~A~0.base)) (<= 0 |thread2Thread1of1ForFork1_~i~1#1|)), 877#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~N~0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), Black: 1029#(and (<= 1 ~N~0) (or (< |thread3Thread1of1ForFork2_~i~2#1| ~N~0) (< 0 ~M~0))), Black: 1031#(and (<= 1 ~N~0) (<= 1 ~M~0)), Black: 1035#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), Black: 720#(= ~res2~0 ~res1~0), 15#L65true, 180#true, 22#L85-4true, 1197#(and (<= |thread2Thread1of1ForFork1_~i~1#1| 0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), 9#L57-1true, 709#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (= |thread2Thread1of1ForFork1_~i~1#1| 0) (<= 8 (select |#length| ~A~0.base))), Black: 871#(and (<= (+ ~M~0 1) ~N~0) (<= 1 ~N~0)), Black: 875#(and (<= (+ ~M~0 1) ~N~0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), Black: 337#(and (= |thread1Thread1of1ForFork0_~i~0#1| 0) (= ~A~0.offset 0) (<= (* ~N~0 4) (select |#length| ~A~0.base))), 1033#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0) (or (< |thread3Thread1of1ForFork2_~i~2#1| ~N~0) (< 0 ~M~0))), Black: 433#(and (= ~A~0.offset 0) (<= (* ~N~0 4) (select |#length| ~A~0.base)) (<= 1 |thread1Thread1of1ForFork0_~i~0#1|) (<= 8 (select |#length| ~A~0.base))), Black: 214#(and (<= ~N~0 1) (<= 1 |thread1Thread1of1ForFork0_~i~0#1|)), 431#(and (= ~A~0.offset 0) (= |thread1Thread1of1ForFork0_~i~0#1| 1) (<= (* ~N~0 4) (select |#length| ~A~0.base)) (<= 8 (select |#length| ~A~0.base)))]) [2024-11-19 09:50:58,699 INFO L294 olderBase$Statistics]: this new event has 24 ancestors and is cut-off event [2024-11-19 09:50:58,699 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2024-11-19 09:50:58,699 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2024-11-19 09:50:58,699 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2024-11-19 09:50:58,783 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([592] L47-->L46-7: Formula: (let ((.cse1 (* |v_thread1Thread1of1ForFork0_~i~0#1_9| 4))) (let ((.cse0 (+ .cse1 v_~A~0.offset_99))) (and (= |v_thread1Thread1of1ForFork0_plus_#res#1_1| (+ (select (select |v_#memory_int#1_66| v_~A~0.base_102) .cse0) v_~res1~0_60)) (not (= (ite (or (<= |v_thread1Thread1of1ForFork0_plus_#res#1_1| 2147483647) (<= |v_thread1Thread1of1ForFork0_plus_#res#1_1| v_~res1~0_60)) 1 0) 0)) (= |v_thread1Thread1of1ForFork0_plus_#res#1_1| v_~res1~0_59) (= (select |v_#valid_134| v_~A~0.base_102) 1) (= |v_thread1Thread1of1ForFork0_~i~0#1_10| (+ |v_thread1Thread1of1ForFork0_~i~0#1_9| 1)) (not (= (ite (or (<= v_~res1~0_60 |v_thread1Thread1of1ForFork0_plus_#res#1_1|) (<= 0 (+ |v_thread1Thread1of1ForFork0_plus_#res#1_1| 2147483648))) 1 0) 0)) (<= 0 (+ v_~res1~0_59 2147483648)) (<= (+ .cse1 v_~A~0.offset_99 4) (select |v_#length_123| v_~A~0.base_102)) (<= 0 .cse0) (<= v_~res1~0_59 2147483647)))) InVars {~res1~0=v_~res1~0_60, ~A~0.base=v_~A~0.base_102, ~A~0.offset=v_~A~0.offset_99, thread1Thread1of1ForFork0_~i~0#1=|v_thread1Thread1of1ForFork0_~i~0#1_9|, #valid=|v_#valid_134|, #length=|v_#length_123|, #memory_int#1=|v_#memory_int#1_66|} OutVars{~res1~0=v_~res1~0_59, ~A~0.base=v_~A~0.base_102, thread1Thread1of1ForFork0_~tmp~0#1=|v_thread1Thread1of1ForFork0_~tmp~0#1_1|, thread1Thread1of1ForFork0_plus_~a#1=|v_thread1Thread1of1ForFork0_plus_~a#1_1|, thread1Thread1of1ForFork0_plus_#in~a#1=|v_thread1Thread1of1ForFork0_plus_#in~a#1_1|, thread1Thread1of1ForFork0_plus_~b#1=|v_thread1Thread1of1ForFork0_plus_~b#1_1|, #memory_int#1=|v_#memory_int#1_66|, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_1|, ~A~0.offset=v_~A~0.offset_99, thread1Thread1of1ForFork0_#t~post3#1=|v_thread1Thread1of1ForFork0_#t~post3#1_1|, thread1Thread1of1ForFork0_~i~0#1=|v_thread1Thread1of1ForFork0_~i~0#1_10|, thread1Thread1of1ForFork0_#t~ret2#1=|v_thread1Thread1of1ForFork0_#t~ret2#1_1|, #valid=|v_#valid_134|, thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1_1|, #length=|v_#length_123|, thread1Thread1of1ForFork0_plus_#in~b#1=|v_thread1Thread1of1ForFork0_plus_#in~b#1_1|, thread1Thread1of1ForFork0_plus_#res#1=|v_thread1Thread1of1ForFork0_plus_#res#1_1|, thread1Thread1of1ForFork0_#t~mem1#1=|v_thread1Thread1of1ForFork0_#t~mem1#1_1|} AuxVars[] AssignedVars[~res1~0, thread1Thread1of1ForFork0_~tmp~0#1, thread1Thread1of1ForFork0_plus_~a#1, thread1Thread1of1ForFork0_plus_#in~a#1, thread1Thread1of1ForFork0_plus_~b#1, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1, thread1Thread1of1ForFork0_#t~post3#1, thread1Thread1of1ForFork0_~i~0#1, thread1Thread1of1ForFork0_#t~ret2#1, thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1, thread1Thread1of1ForFork0_plus_#in~b#1, thread1Thread1of1ForFork0_plus_#res#1, thread1Thread1of1ForFork0_#t~mem1#1][277], [24#L46-7true, Black: 266#(and (= ~A~0.offset 0) (<= 4 (select |#length| ~A~0.base))), 109#(= (select |#valid| ~A~0.base) 1), Black: 585#(and (or (< ~N~0 2) (< (+ |ULTIMATE.start_create_fresh_int_array_~i~3#1| 1) |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= ~M~0 1) (<= 0 ~M~0) (<= 1 |thread2Thread1of1ForFork1_~i~1#1|)), Black: 593#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (= |thread2Thread1of1ForFork1_~i~1#1| 0)), Black: 884#(<= 1 ~N~0), Black: 1027#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0)), Black: 713#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (<= 8 (select |#length| ~A~0.base)) (<= 0 |thread2Thread1of1ForFork1_~i~1#1|)), 877#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~N~0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), Black: 1029#(and (<= 1 ~N~0) (or (< |thread3Thread1of1ForFork2_~i~2#1| ~N~0) (< 0 ~M~0))), Black: 1031#(and (<= 1 ~N~0) (<= 1 ~M~0)), Black: 1035#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), Black: 720#(= ~res2~0 ~res1~0), 15#L65true, 180#true, 1197#(and (<= |thread2Thread1of1ForFork1_~i~1#1| 0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), 709#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (= |thread2Thread1of1ForFork1_~i~1#1| 0) (<= 8 (select |#length| ~A~0.base))), 9#L57-1true, Black: 871#(and (<= (+ ~M~0 1) ~N~0) (<= 1 ~N~0)), Black: 875#(and (<= (+ ~M~0 1) ~N~0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), 4#L86true, Black: 337#(and (= |thread1Thread1of1ForFork0_~i~0#1| 0) (= ~A~0.offset 0) (<= (* ~N~0 4) (select |#length| ~A~0.base))), 1033#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0) (or (< |thread3Thread1of1ForFork2_~i~2#1| ~N~0) (< 0 ~M~0))), Black: 433#(and (= ~A~0.offset 0) (<= (* ~N~0 4) (select |#length| ~A~0.base)) (<= 1 |thread1Thread1of1ForFork0_~i~0#1|) (<= 8 (select |#length| ~A~0.base))), Black: 214#(and (<= ~N~0 1) (<= 1 |thread1Thread1of1ForFork0_~i~0#1|)), 431#(and (= ~A~0.offset 0) (= |thread1Thread1of1ForFork0_~i~0#1| 1) (<= (* ~N~0 4) (select |#length| ~A~0.base)) (<= 8 (select |#length| ~A~0.base)))]) [2024-11-19 09:50:58,784 INFO L294 olderBase$Statistics]: this new event has 25 ancestors and is cut-off event [2024-11-19 09:50:58,784 INFO L297 olderBase$Statistics]: existing Event has 25 ancestors and is cut-off event [2024-11-19 09:50:58,784 INFO L297 olderBase$Statistics]: existing Event has 21 ancestors and is cut-off event [2024-11-19 09:50:58,784 INFO L297 olderBase$Statistics]: existing Event has 21 ancestors and is cut-off event [2024-11-19 09:50:59,345 INFO L124 PetriNetUnfolderBase]: 10028/14899 cut-off events. [2024-11-19 09:50:59,346 INFO L125 PetriNetUnfolderBase]: For 54842/55488 co-relation queries the response was YES. [2024-11-19 09:50:59,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60284 conditions, 14899 events. 10028/14899 cut-off events. For 54842/55488 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 90106 event pairs, 1596 based on Foata normal form. 242/14723 useless extension candidates. Maximal degree in co-relation 51165. Up to 3970 conditions per place. [2024-11-19 09:50:59,428 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 253 selfloop transitions, 100 changer transitions 0/361 dead transitions. [2024-11-19 09:50:59,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 361 transitions, 3188 flow [2024-11-19 09:50:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 09:50:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 09:50:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 399 transitions. [2024-11-19 09:50:59,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-11-19 09:50:59,432 INFO L175 Difference]: Start difference. First operand has 90 places, 110 transitions, 842 flow. Second operand 16 states and 399 transitions. [2024-11-19 09:50:59,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 361 transitions, 3188 flow [2024-11-19 09:50:59,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 361 transitions, 3165 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-19 09:50:59,700 INFO L231 Difference]: Finished difference. Result has 111 places, 166 transitions, 1785 flow [2024-11-19 09:50:59,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1785, PETRI_PLACES=111, PETRI_TRANSITIONS=166} [2024-11-19 09:50:59,701 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 64 predicate places. [2024-11-19 09:50:59,701 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 166 transitions, 1785 flow [2024-11-19 09:50:59,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 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) [2024-11-19 09:50:59,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:59,701 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:59,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:50:59,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 09:50:59,902 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:50:59,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash 647655281, now seen corresponding path program 4 times [2024-11-19 09:50:59,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:59,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232100284] [2024-11-19 09:50:59,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:50:59,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:59,913 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:50:59,913 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:50:59,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:59,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232100284] [2024-11-19 09:50:59,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232100284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:59,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781526500] [2024-11-19 09:50:59,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:50:59,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:59,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:59,959 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:59,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:51:00,016 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:51:00,017 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:00,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:51:00,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:00,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:00,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781526500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:00,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:00,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-19 09:51:00,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365841341] [2024-11-19 09:51:00,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:00,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:51:00,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:51:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:51:00,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-11-19 09:51:00,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 166 transitions, 1785 flow. Second operand has 12 states, 12 states have (on average 17.5) internal successors, (210), 12 states have internal predecessors, (210), 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) [2024-11-19 09:51:00,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:00,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-11-19 09:51:00,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:03,811 INFO L124 PetriNetUnfolderBase]: 19090/28698 cut-off events. [2024-11-19 09:51:03,812 INFO L125 PetriNetUnfolderBase]: For 178561/178622 co-relation queries the response was YES. [2024-11-19 09:51:03,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133590 conditions, 28698 events. 19090/28698 cut-off events. For 178561/178622 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 191638 event pairs, 1478 based on Foata normal form. 59/27589 useless extension candidates. Maximal degree in co-relation 120757. Up to 4977 conditions per place. [2024-11-19 09:51:04,140 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 596 selfloop transitions, 520 changer transitions 0/1121 dead transitions. [2024-11-19 09:51:04,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 1121 transitions, 13899 flow [2024-11-19 09:51:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-19 09:51:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-19 09:51:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 862 transitions. [2024-11-19 09:51:04,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5473015873015873 [2024-11-19 09:51:04,142 INFO L175 Difference]: Start difference. First operand has 111 places, 166 transitions, 1785 flow. Second operand 35 states and 862 transitions. [2024-11-19 09:51:04,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 1121 transitions, 13899 flow [2024-11-19 09:51:05,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 1121 transitions, 13200 flow, removed 149 selfloop flow, removed 6 redundant places. [2024-11-19 09:51:05,469 INFO L231 Difference]: Finished difference. Result has 169 places, 629 transitions, 9000 flow [2024-11-19 09:51:05,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9000, PETRI_PLACES=169, PETRI_TRANSITIONS=629} [2024-11-19 09:51:05,470 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 122 predicate places. [2024-11-19 09:51:05,470 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 629 transitions, 9000 flow [2024-11-19 09:51:05,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.5) internal successors, (210), 12 states have internal predecessors, (210), 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) [2024-11-19 09:51:05,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:05,470 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:05,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 09:51:05,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:05,671 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:51:05,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:05,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1284491843, now seen corresponding path program 5 times [2024-11-19 09:51:05,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:05,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452105035] [2024-11-19 09:51:05,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:51:05,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:05,681 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:05,681 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:05,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:05,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452105035] [2024-11-19 09:51:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452105035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:05,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:05,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:51:05,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077778270] [2024-11-19 09:51:05,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:05,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:51:05,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:51:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:51:05,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:51:05,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 629 transitions, 9000 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-11-19 09:51:05,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:05,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:51:05,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:11,283 INFO L124 PetriNetUnfolderBase]: 21168/31995 cut-off events. [2024-11-19 09:51:11,283 INFO L125 PetriNetUnfolderBase]: For 322406/323474 co-relation queries the response was YES. [2024-11-19 09:51:11,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175110 conditions, 31995 events. 21168/31995 cut-off events. For 322406/323474 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 218251 event pairs, 5941 based on Foata normal form. 455/31637 useless extension candidates. Maximal degree in co-relation 171709. Up to 15315 conditions per place. [2024-11-19 09:51:11,726 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 545 selfloop transitions, 178 changer transitions 7/868 dead transitions. [2024-11-19 09:51:11,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 868 transitions, 12863 flow [2024-11-19 09:51:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-11-19 09:51:11,727 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-19 09:51:11,727 INFO L175 Difference]: Start difference. First operand has 169 places, 629 transitions, 9000 flow. Second operand 7 states and 190 transitions. [2024-11-19 09:51:11,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 868 transitions, 12863 flow [2024-11-19 09:51:14,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 868 transitions, 12703 flow, removed 80 selfloop flow, removed 0 redundant places. [2024-11-19 09:51:14,909 INFO L231 Difference]: Finished difference. Result has 179 places, 684 transitions, 10436 flow [2024-11-19 09:51:14,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8884, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10436, PETRI_PLACES=179, PETRI_TRANSITIONS=684} [2024-11-19 09:51:14,910 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 132 predicate places. [2024-11-19 09:51:14,910 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 684 transitions, 10436 flow [2024-11-19 09:51:14,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2024-11-19 09:51:14,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:14,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:14,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:51:14,911 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:51:14,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash 713234439, now seen corresponding path program 6 times [2024-11-19 09:51:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:14,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732274867] [2024-11-19 09:51:14,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:51:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:14,924 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 09:51:14,925 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:15,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:15,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732274867] [2024-11-19 09:51:15,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732274867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:15,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30961421] [2024-11-19 09:51:15,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:51:15,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:15,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:15,011 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:15,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:51:15,081 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 09:51:15,081 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:15,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:51:15,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:15,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:15,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30961421] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:15,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:51:15,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-19 09:51:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45600056] [2024-11-19 09:51:15,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:15,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:51:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:51:15,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:51:15,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:51:15,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 684 transitions, 10436 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:15,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:15,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:51:15,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:21,038 INFO L124 PetriNetUnfolderBase]: 21350/32505 cut-off events. [2024-11-19 09:51:21,039 INFO L125 PetriNetUnfolderBase]: For 329644/331277 co-relation queries the response was YES. [2024-11-19 09:51:21,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180097 conditions, 32505 events. 21350/32505 cut-off events. For 329644/331277 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 225969 event pairs, 3576 based on Foata normal form. 532/32284 useless extension candidates. Maximal degree in co-relation 176649. Up to 8159 conditions per place. [2024-11-19 09:51:21,566 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 481 selfloop transitions, 450 changer transitions 0/946 dead transitions. [2024-11-19 09:51:21,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 946 transitions, 14934 flow [2024-11-19 09:51:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:51:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:51:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-11-19 09:51:21,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2024-11-19 09:51:21,567 INFO L175 Difference]: Start difference. First operand has 179 places, 684 transitions, 10436 flow. Second operand 9 states and 237 transitions. [2024-11-19 09:51:21,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 946 transitions, 14934 flow [2024-11-19 09:51:25,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 946 transitions, 14798 flow, removed 68 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:25,635 INFO L231 Difference]: Finished difference. Result has 188 places, 753 transitions, 12898 flow [2024-11-19 09:51:25,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10290, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12898, PETRI_PLACES=188, PETRI_TRANSITIONS=753} [2024-11-19 09:51:25,636 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 141 predicate places. [2024-11-19 09:51:25,636 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 753 transitions, 12898 flow [2024-11-19 09:51:25,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:25,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:25,636 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:25,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:25,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:51:25,841 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:51:25,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash 134994227, now seen corresponding path program 7 times [2024-11-19 09:51:25,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:25,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472187746] [2024-11-19 09:51:25,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:51:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:25,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:25,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472187746] [2024-11-19 09:51:25,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472187746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:25,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048744345] [2024-11-19 09:51:25,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:51:25,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:25,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:25,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:25,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:51:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:26,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:51:26,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:26,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:26,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048744345] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:26,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:51:26,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-19 09:51:26,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494025575] [2024-11-19 09:51:26,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:26,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:51:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:51:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:51:26,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:51:26,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 753 transitions, 12898 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:26,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:26,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:51:26,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:32,081 INFO L124 PetriNetUnfolderBase]: 21386/32456 cut-off events. [2024-11-19 09:51:32,081 INFO L125 PetriNetUnfolderBase]: For 401414/403000 co-relation queries the response was YES. [2024-11-19 09:51:32,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186853 conditions, 32456 events. 21386/32456 cut-off events. For 401414/403000 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 223640 event pairs, 2710 based on Foata normal form. 540/32269 useless extension candidates. Maximal degree in co-relation 185070. Up to 11101 conditions per place. [2024-11-19 09:51:32,439 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 362 selfloop transitions, 510 changer transitions 0/887 dead transitions. [2024-11-19 09:51:32,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 887 transitions, 15552 flow [2024-11-19 09:51:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-11-19 09:51:32,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-19 09:51:32,440 INFO L175 Difference]: Start difference. First operand has 188 places, 753 transitions, 12898 flow. Second operand 8 states and 208 transitions. [2024-11-19 09:51:32,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 887 transitions, 15552 flow [2024-11-19 09:51:36,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 887 transitions, 15401 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:36,932 INFO L231 Difference]: Finished difference. Result has 194 places, 753 transitions, 14285 flow [2024-11-19 09:51:36,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12625, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14285, PETRI_PLACES=194, PETRI_TRANSITIONS=753} [2024-11-19 09:51:36,934 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 147 predicate places. [2024-11-19 09:51:36,934 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 753 transitions, 14285 flow [2024-11-19 09:51:36,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:36,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:36,934 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:36,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 09:51:37,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:37,135 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:51:37,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash -462450047, now seen corresponding path program 8 times [2024-11-19 09:51:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:37,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076121438] [2024-11-19 09:51:37,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:37,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:37,155 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:37,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:37,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:37,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076121438] [2024-11-19 09:51:37,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076121438] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:37,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022693483] [2024-11-19 09:51:37,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:37,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:37,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:37,247 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:37,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:51:37,317 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:37,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:37,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:51:37,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:37,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:37,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022693483] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:37,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:51:37,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-19 09:51:37,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364902974] [2024-11-19 09:51:37,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:37,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:51:37,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:51:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:51:37,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-19 09:51:37,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 753 transitions, 14285 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:37,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:37,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-19 09:51:37,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:43,291 INFO L124 PetriNetUnfolderBase]: 21248/32243 cut-off events. [2024-11-19 09:51:43,292 INFO L125 PetriNetUnfolderBase]: For 474366/475864 co-relation queries the response was YES. [2024-11-19 09:51:43,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196854 conditions, 32243 events. 21248/32243 cut-off events. For 474366/475864 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 222664 event pairs, 3131 based on Foata normal form. 392/31889 useless extension candidates. Maximal degree in co-relation 195423. Up to 15399 conditions per place. [2024-11-19 09:51:43,808 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 421 selfloop transitions, 410 changer transitions 0/846 dead transitions. [2024-11-19 09:51:43,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 846 transitions, 16629 flow [2024-11-19 09:51:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-11-19 09:51:43,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-19 09:51:43,809 INFO L175 Difference]: Start difference. First operand has 194 places, 753 transitions, 14285 flow. Second operand 8 states and 207 transitions. [2024-11-19 09:51:43,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 846 transitions, 16629 flow [2024-11-19 09:51:49,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 846 transitions, 16302 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-19 09:51:49,058 INFO L231 Difference]: Finished difference. Result has 193 places, 752 transitions, 14774 flow [2024-11-19 09:51:49,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13954, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14774, PETRI_PLACES=193, PETRI_TRANSITIONS=752} [2024-11-19 09:51:49,060 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 146 predicate places. [2024-11-19 09:51:49,060 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 752 transitions, 14774 flow [2024-11-19 09:51:49,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:49,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:49,060 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:49,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 09:51:49,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:49,261 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:51:49,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1931837884, now seen corresponding path program 1 times [2024-11-19 09:51:49,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:49,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891707858] [2024-11-19 09:51:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:49,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891707858] [2024-11-19 09:51:49,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891707858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:49,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70829648] [2024-11-19 09:51:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:49,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:49,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:49,318 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:49,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:51:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:49,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:51:49,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:49,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:51:49,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70829648] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:49,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:51:49,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-19 09:51:49,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814444797] [2024-11-19 09:51:49,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:49,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:49,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:51:49,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-19 09:51:49,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 752 transitions, 14774 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2024-11-19 09:51:49,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:49,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-19 09:51:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:54,392 INFO L124 PetriNetUnfolderBase]: 18895/28589 cut-off events. [2024-11-19 09:51:54,392 INFO L125 PetriNetUnfolderBase]: For 545146/547393 co-relation queries the response was YES. [2024-11-19 09:51:54,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185095 conditions, 28589 events. 18895/28589 cut-off events. For 545146/547393 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 195752 event pairs, 3901 based on Foata normal form. 1799/29316 useless extension candidates. Maximal degree in co-relation 181520. Up to 14272 conditions per place. [2024-11-19 09:51:54,852 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 649 selfloop transitions, 20 changer transitions 0/925 dead transitions. [2024-11-19 09:51:54,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 925 transitions, 20035 flow [2024-11-19 09:51:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-11-19 09:51:54,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5644444444444444 [2024-11-19 09:51:54,853 INFO L175 Difference]: Start difference. First operand has 193 places, 752 transitions, 14774 flow. Second operand 5 states and 127 transitions. [2024-11-19 09:51:54,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 925 transitions, 20035 flow [2024-11-19 09:51:58,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 925 transitions, 19573 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-11-19 09:51:58,947 INFO L231 Difference]: Finished difference. Result has 193 places, 740 transitions, 14332 flow [2024-11-19 09:51:58,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=14292, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=14332, PETRI_PLACES=193, PETRI_TRANSITIONS=740} [2024-11-19 09:51:58,948 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 146 predicate places. [2024-11-19 09:51:58,948 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 740 transitions, 14332 flow [2024-11-19 09:51:58,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2024-11-19 09:51:58,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:58,948 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:58,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:59,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-19 09:51:59,149 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:51:59,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash 122368342, now seen corresponding path program 1 times [2024-11-19 09:51:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:59,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918190578] [2024-11-19 09:51:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:59,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:59,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918190578] [2024-11-19 09:51:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918190578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308991638] [2024-11-19 09:51:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:59,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:59,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:59,520 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:59,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 09:51:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:59,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 09:51:59,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:59,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:51:59,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:51:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:59,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:59,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-19 09:52:00,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:00,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2024-11-19 09:52:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:00,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308991638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:00,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:00,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-11-19 09:52:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074391184] [2024-11-19 09:52:00,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:00,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:52:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:52:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:52:00,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-11-19 09:52:00,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 740 transitions, 14332 flow. Second operand has 25 states, 25 states have (on average 17.2) internal successors, (430), 25 states have internal predecessors, (430), 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) [2024-11-19 09:52:00,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:00,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-11-19 09:52:00,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand