./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/unroll-cond-2.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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:53:28,755 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:53:28,825 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:53:28,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:53:28,832 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:53:28,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:53:28,859 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:53:28,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:53:28,860 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:53:28,860 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:53:28,861 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:53:28,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:53:28,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:53:28,862 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:53:28,862 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:53:28,863 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:53:28,863 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:53:28,864 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:53:28,864 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:53:28,864 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:53:28,865 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:53:28,865 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:53:28,866 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:53:28,866 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:53:28,866 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:53:28,867 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:53:28,867 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:53:28,867 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:53:28,868 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:53:28,868 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:53:28,868 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:53:28,869 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:53:28,869 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:53:28,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:53:28,870 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:53:28,870 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:53:28,870 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:53:28,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:53:28,875 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:53:28,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:53:28,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:53:28,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:53:28,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-11-22 21:53:29,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:53:29,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:53:29,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:53:29,153 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:53:29,153 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:53:29,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-22 21:53:30,596 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:53:30,791 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:53:30,791 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-22 21:53:30,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d61fd5daf/26b921f5fcff430aae7a2df50fa31487/FLAGf0f9cb8ea [2024-11-22 21:53:31,159 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d61fd5daf/26b921f5fcff430aae7a2df50fa31487 [2024-11-22 21:53:31,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:53:31,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:53:31,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:53:31,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:53:31,168 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:53:31,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518b3496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31, skipping insertion in model container [2024-11-22 21:53:31,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,190 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:53:31,401 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:53:31,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:53:31,417 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:53:31,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:53:31,461 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:53:31,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31 WrapperNode [2024-11-22 21:53:31,461 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:53:31,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:53:31,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:53:31,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:53:31,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,478 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,504 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 136 [2024-11-22 21:53:31,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:53:31,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:53:31,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:53:31,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:53:31,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,522 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,550 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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]. [2024-11-22 21:53:31,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,550 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,560 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,564 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,568 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,573 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:53:31,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:53:31,576 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:53:31,579 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:53:31,579 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (1/1) ... [2024-11-22 21:53:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:53:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:31,613 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) [2024-11-22 21:53:31,617 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 [2024-11-22 21:53:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:53:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:53:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:53:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:53:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:53:31,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:53:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:53:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:53:31,659 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:53:31,744 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:53:31,745 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:53:32,026 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:53:32,026 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:53:32,244 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:53:32,244 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 21:53:32,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:53:32 BoogieIcfgContainer [2024-11-22 21:53:32,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:53:32,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:53:32,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:53:32,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:53:32,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:53:31" (1/3) ... [2024-11-22 21:53:32,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c09a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:53:32, skipping insertion in model container [2024-11-22 21:53:32,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:31" (2/3) ... [2024-11-22 21:53:32,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c09a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:53:32, skipping insertion in model container [2024-11-22 21:53:32,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:53:32" (3/3) ... [2024-11-22 21:53:32,255 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-11-22 21:53:32,271 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:53:32,271 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-22 21:53:32,271 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:53:32,335 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:53:32,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-11-22 21:53:32,403 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-22 21:53:32,403 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:53:32,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 76 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-22 21:53:32,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-11-22 21:53:32,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2024-11-22 21:53:32,419 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:53:32,459 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;@12e40b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:53:32,464 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-22 21:53:32,467 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:53:32,468 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:53:32,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:53:32,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:32,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:53:32,482 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:32,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:32,491 INFO L85 PathProgramCache]: Analyzing trace with hash 466718, now seen corresponding path program 1 times [2024-11-22 21:53:32,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:32,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021584475] [2024-11-22 21:53:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:32,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:32,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021584475] [2024-11-22 21:53:32,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021584475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:32,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:32,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:53:32,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516368256] [2024-11-22 21:53:32,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:32,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:32,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:32,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:32,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:32,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:32,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-22 21:53:32,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:32,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:32,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:32,935 INFO L124 PetriNetUnfolderBase]: 110/249 cut-off events. [2024-11-22 21:53:32,935 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-22 21:53:32,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 249 events. 110/249 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1075 event pairs, 75 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 396. Up to 185 conditions per place. [2024-11-22 21:53:32,940 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-22 21:53:32,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 126 flow [2024-11-22 21:53:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-22 21:53:32,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-11-22 21:53:32,951 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 67 transitions. [2024-11-22 21:53:32,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 126 flow [2024-11-22 21:53:32,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:32,956 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 76 flow [2024-11-22 21:53:32,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2024-11-22 21:53:32,960 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-22 21:53:32,960 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 76 flow [2024-11-22 21:53:32,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-22 21:53:32,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:32,961 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:53:32,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:53:32,961 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:32,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 466719, now seen corresponding path program 1 times [2024-11-22 21:53:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:32,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132130513] [2024-11-22 21:53:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:32,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:33,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:33,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132130513] [2024-11-22 21:53:33,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132130513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:33,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:33,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747745319] [2024-11-22 21:53:33,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:33,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:33,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:33,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:53:33,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:33,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:33,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:33,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:33,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:33,390 INFO L124 PetriNetUnfolderBase]: 111/252 cut-off events. [2024-11-22 21:53:33,390 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:53:33,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 252 events. 111/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1089 event pairs, 75 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 432. Up to 190 conditions per place. [2024-11-22 21:53:33,393 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 24 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-22 21:53:33,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 138 flow [2024-11-22 21:53:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-22 21:53:33,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-22 21:53:33,397 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 76 flow. Second operand 3 states and 70 transitions. [2024-11-22 21:53:33,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 138 flow [2024-11-22 21:53:33,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:33,400 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 91 flow [2024-11-22 21:53:33,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2024-11-22 21:53:33,402 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-22 21:53:33,402 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 91 flow [2024-11-22 21:53:33,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:33,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:33,403 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:53:33,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:53:33,403 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:33,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash 448532008, now seen corresponding path program 1 times [2024-11-22 21:53:33,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:33,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627577401] [2024-11-22 21:53:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:33,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:33,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:33,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627577401] [2024-11-22 21:53:33,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627577401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:33,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103223242] [2024-11-22 21:53:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:33,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:33,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:33,721 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) [2024-11-22 21:53:33,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:53:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:33,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:53:33,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:33,860 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 [2024-11-22 21:53:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:34,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:34,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103223242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:34,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669787896] [2024-11-22 21:53:34,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:34,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:34,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:34,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 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) [2024-11-22 21:53:34,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:34,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:34,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:34,580 INFO L124 PetriNetUnfolderBase]: 112/254 cut-off events. [2024-11-22 21:53:34,580 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:53:34,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 254 events. 112/254 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1094 event pairs, 75 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 432. Up to 187 conditions per place. [2024-11-22 21:53:34,584 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 20 selfloop transitions, 9 changer transitions 0/39 dead transitions. [2024-11-22 21:53:34,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 157 flow [2024-11-22 21:53:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-11-22 21:53:34,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-11-22 21:53:34,589 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 91 flow. Second operand 7 states and 129 transitions. [2024-11-22 21:53:34,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 157 flow [2024-11-22 21:53:34,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:34,593 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 116 flow [2024-11-22 21:53:34,593 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-11-22 21:53:34,593 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-11-22 21:53:34,594 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 116 flow [2024-11-22 21:53:34,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 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) [2024-11-22 21:53:34,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:34,594 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:53:34,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:53:34,795 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 [2024-11-22 21:53:34,795 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:34,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1021976845, now seen corresponding path program 1 times [2024-11-22 21:53:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:34,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388954995] [2024-11-22 21:53:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:34,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:34,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388954995] [2024-11-22 21:53:34,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388954995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:34,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:34,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:34,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995207131] [2024-11-22 21:53:34,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:34,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:34,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:34,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:53:34,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-22 21:53:34,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-22 21:53:34,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:34,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-22 21:53:34,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:34,928 INFO L124 PetriNetUnfolderBase]: 112/228 cut-off events. [2024-11-22 21:53:34,928 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:53:34,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 228 events. 112/228 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 840 event pairs, 75 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 406. Up to 186 conditions per place. [2024-11-22 21:53:34,930 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 25 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-22 21:53:34,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 166 flow [2024-11-22 21:53:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:53:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:53:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-22 21:53:34,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-22 21:53:34,931 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 116 flow. Second operand 4 states and 67 transitions. [2024-11-22 21:53:34,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 166 flow [2024-11-22 21:53:34,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 148 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:34,933 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 98 flow [2024-11-22 21:53:34,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-22 21:53:34,933 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-22 21:53:34,933 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 98 flow [2024-11-22 21:53:34,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-22 21:53:34,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:34,934 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:53:34,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:53:34,934 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:34,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:34,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1021976846, now seen corresponding path program 1 times [2024-11-22 21:53:34,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:34,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830715994] [2024-11-22 21:53:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:34,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:34,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:34,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830715994] [2024-11-22 21:53:34,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830715994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:34,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:34,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:34,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324920281] [2024-11-22 21:53:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:34,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:34,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:34,999 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-22 21:53:34,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-11-22 21:53:34,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:34,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-22 21:53:34,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:35,054 INFO L124 PetriNetUnfolderBase]: 111/227 cut-off events. [2024-11-22 21:53:35,054 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:53:35,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 227 events. 111/227 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 829 event pairs, 75 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 406. Up to 191 conditions per place. [2024-11-22 21:53:35,055 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 26 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-22 21:53:35,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 149 flow [2024-11-22 21:53:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-22 21:53:35,057 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-22 21:53:35,057 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 98 flow. Second operand 3 states and 71 transitions. [2024-11-22 21:53:35,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 149 flow [2024-11-22 21:53:35,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:35,058 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 93 flow [2024-11-22 21:53:35,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-22 21:53:35,059 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-22 21:53:35,059 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 93 flow [2024-11-22 21:53:35,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-11-22 21:53:35,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:35,059 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:35,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:53:35,060 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:35,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash 576645477, now seen corresponding path program 1 times [2024-11-22 21:53:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371329188] [2024-11-22 21:53:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:35,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:35,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371329188] [2024-11-22 21:53:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371329188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877773392] [2024-11-22 21:53:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:35,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:35,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:35,218 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) [2024-11-22 21:53:35,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:53:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:35,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:53:35,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:35,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:35,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-22 21:53:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:35,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877773392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:35,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:35,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:35,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893367802] [2024-11-22 21:53:35,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:35,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:35,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:35,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:35,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 93 flow. Second operand has 11 states, 11 states have (on average 16.181818181818183) internal successors, (178), 11 states have internal predecessors, (178), 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) [2024-11-22 21:53:35,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:35,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:35,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:35,744 INFO L124 PetriNetUnfolderBase]: 232/429 cut-off events. [2024-11-22 21:53:35,744 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-22 21:53:35,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 429 events. 232/429 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1812 event pairs, 82 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 833. Up to 220 conditions per place. [2024-11-22 21:53:35,749 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 41 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-11-22 21:53:35,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 222 flow [2024-11-22 21:53:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-22 21:53:35,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-22 21:53:35,752 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 93 flow. Second operand 5 states and 114 transitions. [2024-11-22 21:53:35,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 222 flow [2024-11-22 21:53:35,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:35,754 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 108 flow [2024-11-22 21:53:35,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-22 21:53:35,755 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2024-11-22 21:53:35,755 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 108 flow [2024-11-22 21:53:35,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.181818181818183) internal successors, (178), 11 states have internal predecessors, (178), 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) [2024-11-22 21:53:35,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:35,755 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:35,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:53:35,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 21:53:35,961 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:35,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 105537385, now seen corresponding path program 1 times [2024-11-22 21:53:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:35,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021815102] [2024-11-22 21:53:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:36,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:36,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021815102] [2024-11-22 21:53:36,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021815102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942159602] [2024-11-22 21:53:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:36,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:36,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:36,147 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) [2024-11-22 21:53:36,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:53:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:36,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:36,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:36,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:36,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-22 21:53:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:36,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942159602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:36,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:36,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:53:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057875717] [2024-11-22 21:53:36,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:36,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:36,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:36,901 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:36,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 108 flow. Second operand has 17 states, 17 states have (on average 15.764705882352942) internal successors, (268), 17 states have internal predecessors, (268), 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) [2024-11-22 21:53:36,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:36,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:37,392 INFO L124 PetriNetUnfolderBase]: 508/980 cut-off events. [2024-11-22 21:53:37,392 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-22 21:53:37,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 980 events. 508/980 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5256 event pairs, 236 based on Foata normal form. 0/843 useless extension candidates. Maximal degree in co-relation 1096. Up to 372 conditions per place. [2024-11-22 21:53:37,399 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-11-22 21:53:37,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 88 transitions, 398 flow [2024-11-22 21:53:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-22 21:53:37,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-11-22 21:53:37,401 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 108 flow. Second operand 8 states and 194 transitions. [2024-11-22 21:53:37,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 88 transitions, 398 flow [2024-11-22 21:53:37,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 88 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:37,403 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 168 flow [2024-11-22 21:53:37,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-22 21:53:37,405 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2024-11-22 21:53:37,405 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 168 flow [2024-11-22 21:53:37,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.764705882352942) internal successors, (268), 17 states have internal predecessors, (268), 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) [2024-11-22 21:53:37,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:37,407 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:37,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:53:37,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:37,611 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:37,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash 84923166, now seen corresponding path program 1 times [2024-11-22 21:53:37,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:37,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764423649] [2024-11-22 21:53:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:37,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:37,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:37,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764423649] [2024-11-22 21:53:37,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764423649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:37,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632017191] [2024-11-22 21:53:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:37,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:37,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:37,773 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) [2024-11-22 21:53:37,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:53:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:37,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:53:37,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:37,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:37,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-22 21:53:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:37,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632017191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:37,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:37,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:37,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461502888] [2024-11-22 21:53:37,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:37,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:37,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:37,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:38,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-22 21:53:38,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 168 flow. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 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) [2024-11-22 21:53:38,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:38,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-22 21:53:38,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:38,365 INFO L124 PetriNetUnfolderBase]: 831/1437 cut-off events. [2024-11-22 21:53:38,365 INFO L125 PetriNetUnfolderBase]: For 830/890 co-relation queries the response was YES. [2024-11-22 21:53:38,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 1437 events. 831/1437 cut-off events. For 830/890 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7126 event pairs, 246 based on Foata normal form. 64/1403 useless extension candidates. Maximal degree in co-relation 2294. Up to 853 conditions per place. [2024-11-22 21:53:38,374 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 47 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-11-22 21:53:38,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 338 flow [2024-11-22 21:53:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-22 21:53:38,375 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-22 21:53:38,376 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 168 flow. Second operand 5 states and 104 transitions. [2024-11-22 21:53:38,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 338 flow [2024-11-22 21:53:38,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 331 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:38,379 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 199 flow [2024-11-22 21:53:38,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-11-22 21:53:38,381 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-11-22 21:53:38,381 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 199 flow [2024-11-22 21:53:38,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 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) [2024-11-22 21:53:38,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:38,381 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:38,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:53:38,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:38,582 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:38,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1662348661, now seen corresponding path program 1 times [2024-11-22 21:53:38,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:38,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770736950] [2024-11-22 21:53:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:38,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:38,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:38,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770736950] [2024-11-22 21:53:38,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770736950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:38,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268317280] [2024-11-22 21:53:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:38,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:38,749 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) [2024-11-22 21:53:38,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:53:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:38,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:38,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:38,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:38,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-22 21:53:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:39,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268317280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:39,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:39,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-22 21:53:39,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136393434] [2024-11-22 21:53:39,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:39,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:53:39,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:53:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:53:39,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-22 21:53:39,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 199 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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) [2024-11-22 21:53:39,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:39,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-22 21:53:39,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:39,652 INFO L124 PetriNetUnfolderBase]: 853/1466 cut-off events. [2024-11-22 21:53:39,652 INFO L125 PetriNetUnfolderBase]: For 982/1069 co-relation queries the response was YES. [2024-11-22 21:53:39,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3847 conditions, 1466 events. 853/1466 cut-off events. For 982/1069 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7278 event pairs, 426 based on Foata normal form. 0/1370 useless extension candidates. Maximal degree in co-relation 2484. Up to 1107 conditions per place. [2024-11-22 21:53:39,663 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 64 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-11-22 21:53:39,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 456 flow [2024-11-22 21:53:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-11-22 21:53:39,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-22 21:53:39,664 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 199 flow. Second operand 7 states and 152 transitions. [2024-11-22 21:53:39,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 456 flow [2024-11-22 21:53:39,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 440 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:39,669 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 225 flow [2024-11-22 21:53:39,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-22 21:53:39,670 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2024-11-22 21:53:39,670 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 225 flow [2024-11-22 21:53:39,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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) [2024-11-22 21:53:39,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:39,670 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:39,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:53:39,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:39,875 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:39,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:39,876 INFO L85 PathProgramCache]: Analyzing trace with hash 417670208, now seen corresponding path program 2 times [2024-11-22 21:53:39,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:39,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997065472] [2024-11-22 21:53:39,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:39,891 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:39,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:40,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997065472] [2024-11-22 21:53:40,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997065472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882654091] [2024-11-22 21:53:40,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:40,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:40,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:40,021 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) [2024-11-22 21:53:40,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:53:40,077 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:40,078 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:40,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:53:40,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:40,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:53:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:40,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:40,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882654091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:40,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:40,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:40,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846075911] [2024-11-22 21:53:40,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:40,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:40,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:40,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:40,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:40,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 225 flow. Second operand has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:40,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:40,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:40,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:40,841 INFO L124 PetriNetUnfolderBase]: 708/1292 cut-off events. [2024-11-22 21:53:40,842 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2024-11-22 21:53:40,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3354 conditions, 1292 events. 708/1292 cut-off events. For 713/713 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6945 event pairs, 383 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2224. Up to 867 conditions per place. [2024-11-22 21:53:40,849 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 46 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-11-22 21:53:40,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 409 flow [2024-11-22 21:53:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-22 21:53:40,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-22 21:53:40,850 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 225 flow. Second operand 5 states and 105 transitions. [2024-11-22 21:53:40,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 409 flow [2024-11-22 21:53:40,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 386 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:40,854 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 221 flow [2024-11-22 21:53:40,854 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-11-22 21:53:40,855 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-11-22 21:53:40,855 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 221 flow [2024-11-22 21:53:40,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:40,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:40,855 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:40,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:53:41,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:41,056 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:41,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash -576165740, now seen corresponding path program 2 times [2024-11-22 21:53:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:41,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684423225] [2024-11-22 21:53:41,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:41,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:41,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:41,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:41,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:41,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684423225] [2024-11-22 21:53:41,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684423225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:41,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:41,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:53:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665991891] [2024-11-22 21:53:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:41,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:41,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-22 21:53:41,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2024-11-22 21:53:41,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:41,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-22 21:53:41,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:41,566 INFO L124 PetriNetUnfolderBase]: 807/1385 cut-off events. [2024-11-22 21:53:41,566 INFO L125 PetriNetUnfolderBase]: For 1676/1676 co-relation queries the response was YES. [2024-11-22 21:53:41,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3884 conditions, 1385 events. 807/1385 cut-off events. For 1676/1676 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6736 event pairs, 566 based on Foata normal form. 0/1255 useless extension candidates. Maximal degree in co-relation 2483. Up to 1184 conditions per place. [2024-11-22 21:53:41,576 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 43 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-11-22 21:53:41,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 378 flow [2024-11-22 21:53:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-22 21:53:41,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-22 21:53:41,578 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 221 flow. Second operand 5 states and 92 transitions. [2024-11-22 21:53:41,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 378 flow [2024-11-22 21:53:41,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 346 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:41,582 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 213 flow [2024-11-22 21:53:41,582 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-22 21:53:41,583 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2024-11-22 21:53:41,583 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 213 flow [2024-11-22 21:53:41,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2024-11-22 21:53:41,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:41,583 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:41,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:53:41,584 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:41,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 210786255, now seen corresponding path program 1 times [2024-11-22 21:53:41,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:41,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590026975] [2024-11-22 21:53:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:41,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:41,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:41,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590026975] [2024-11-22 21:53:41,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590026975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:41,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885255166] [2024-11-22 21:53:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:41,796 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) [2024-11-22 21:53:41,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:53:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:41,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:41,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:42,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:42,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-22 21:53:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:42,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885255166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:42,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:42,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:53:42,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941487528] [2024-11-22 21:53:42,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:42,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:42,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:42,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:42,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-22 21:53:42,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 213 flow. Second operand has 17 states, 17 states have (on average 14.294117647058824) internal successors, (243), 17 states have internal predecessors, (243), 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) [2024-11-22 21:53:42,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:42,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-22 21:53:42,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:42,934 INFO L124 PetriNetUnfolderBase]: 762/1308 cut-off events. [2024-11-22 21:53:42,934 INFO L125 PetriNetUnfolderBase]: For 1022/1022 co-relation queries the response was YES. [2024-11-22 21:53:42,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3509 conditions, 1308 events. 762/1308 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6279 event pairs, 396 based on Foata normal form. 16/1244 useless extension candidates. Maximal degree in co-relation 2379. Up to 642 conditions per place. [2024-11-22 21:53:42,943 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 73 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-11-22 21:53:42,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 90 transitions, 530 flow [2024-11-22 21:53:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-11-22 21:53:42,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-22 21:53:42,944 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 213 flow. Second operand 8 states and 176 transitions. [2024-11-22 21:53:42,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 90 transitions, 530 flow [2024-11-22 21:53:42,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 508 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:42,948 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 266 flow [2024-11-22 21:53:42,949 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=266, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-11-22 21:53:42,949 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2024-11-22 21:53:42,949 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 266 flow [2024-11-22 21:53:42,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.294117647058824) internal successors, (243), 17 states have internal predecessors, (243), 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) [2024-11-22 21:53:42,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:42,950 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:42,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:53:43,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:43,155 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:43,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash 355520408, now seen corresponding path program 2 times [2024-11-22 21:53:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116911413] [2024-11-22 21:53:43,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:43,167 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:43,168 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:43,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:43,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116911413] [2024-11-22 21:53:43,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116911413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:43,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174550880] [2024-11-22 21:53:43,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:43,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:43,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:43,287 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) [2024-11-22 21:53:43,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:53:43,378 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:43,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:43,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 21:53:43,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:43,390 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 [2024-11-22 21:53:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:43,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:43,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174550880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:43,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:43,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:43,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306545116] [2024-11-22 21:53:43,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:43,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:43,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:43,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-22 21:53:43,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 11 states have internal predecessors, (171), 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) [2024-11-22 21:53:43,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:43,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-22 21:53:43,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:44,101 INFO L124 PetriNetUnfolderBase]: 706/1220 cut-off events. [2024-11-22 21:53:44,101 INFO L125 PetriNetUnfolderBase]: For 1319/1319 co-relation queries the response was YES. [2024-11-22 21:53:44,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1220 events. 706/1220 cut-off events. For 1319/1319 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5872 event pairs, 322 based on Foata normal form. 16/1234 useless extension candidates. Maximal degree in co-relation 2305. Up to 716 conditions per place. [2024-11-22 21:53:44,109 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 39 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2024-11-22 21:53:44,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 422 flow [2024-11-22 21:53:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-11-22 21:53:44,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-11-22 21:53:44,110 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 266 flow. Second operand 5 states and 91 transitions. [2024-11-22 21:53:44,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 422 flow [2024-11-22 21:53:44,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 406 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:44,114 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 269 flow [2024-11-22 21:53:44,114 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-11-22 21:53:44,115 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-11-22 21:53:44,115 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 269 flow [2024-11-22 21:53:44,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 11 states have internal predecessors, (171), 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) [2024-11-22 21:53:44,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:44,116 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:44,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:53:44,319 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,SelfDestructingSolverStorable12 [2024-11-22 21:53:44,320 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:44,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1319414913, now seen corresponding path program 1 times [2024-11-22 21:53:44,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:44,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269968195] [2024-11-22 21:53:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:44,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:44,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:44,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269968195] [2024-11-22 21:53:44,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269968195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:44,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:44,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:44,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545244924] [2024-11-22 21:53:44,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:44,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:44,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:44,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-22 21:53:44,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:44,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:44,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-22 21:53:44,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:44,520 INFO L124 PetriNetUnfolderBase]: 716/1220 cut-off events. [2024-11-22 21:53:44,521 INFO L125 PetriNetUnfolderBase]: For 1482/1482 co-relation queries the response was YES. [2024-11-22 21:53:44,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3749 conditions, 1220 events. 716/1220 cut-off events. For 1482/1482 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5765 event pairs, 203 based on Foata normal form. 2/1222 useless extension candidates. Maximal degree in co-relation 2471. Up to 904 conditions per place. [2024-11-22 21:53:44,528 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 51 selfloop transitions, 7 changer transitions 1/61 dead transitions. [2024-11-22 21:53:44,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 448 flow [2024-11-22 21:53:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-22 21:53:44,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-11-22 21:53:44,530 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 269 flow. Second operand 3 states and 85 transitions. [2024-11-22 21:53:44,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 448 flow [2024-11-22 21:53:44,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 412 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:44,535 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 288 flow [2024-11-22 21:53:44,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-22 21:53:44,536 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-11-22 21:53:44,536 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 288 flow [2024-11-22 21:53:44,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:44,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:44,536 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:44,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 21:53:44,536 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:44,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:44,537 INFO L85 PathProgramCache]: Analyzing trace with hash -936127283, now seen corresponding path program 1 times [2024-11-22 21:53:44,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:44,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807019698] [2024-11-22 21:53:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:44,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:44,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:44,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807019698] [2024-11-22 21:53:44,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807019698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:44,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:44,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84474837] [2024-11-22 21:53:44,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:44,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:44,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:44,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:44,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-22 21:53:44,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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) [2024-11-22 21:53:44,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:44,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-22 21:53:44,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:44,831 INFO L124 PetriNetUnfolderBase]: 698/1212 cut-off events. [2024-11-22 21:53:44,832 INFO L125 PetriNetUnfolderBase]: For 1607/1607 co-relation queries the response was YES. [2024-11-22 21:53:44,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 1212 events. 698/1212 cut-off events. For 1607/1607 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6232 event pairs, 257 based on Foata normal form. 18/1230 useless extension candidates. Maximal degree in co-relation 2443. Up to 664 conditions per place. [2024-11-22 21:53:44,839 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 85 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2024-11-22 21:53:44,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 757 flow [2024-11-22 21:53:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-11-22 21:53:44,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-11-22 21:53:44,841 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 288 flow. Second operand 5 states and 131 transitions. [2024-11-22 21:53:44,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 757 flow [2024-11-22 21:53:44,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 734 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:44,846 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 350 flow [2024-11-22 21:53:44,846 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-22 21:53:44,847 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-11-22 21:53:44,847 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 350 flow [2024-11-22 21:53:44,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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) [2024-11-22 21:53:44,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:44,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:44,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:53:44,848 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:44,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:44,849 INFO L85 PathProgramCache]: Analyzing trace with hash 452279287, now seen corresponding path program 2 times [2024-11-22 21:53:44,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:44,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42176224] [2024-11-22 21:53:44,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:44,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:44,861 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:44,861 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42176224] [2024-11-22 21:53:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42176224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:44,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:44,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:53:44,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303218823] [2024-11-22 21:53:44,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:44,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:53:44,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:53:44,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:53:44,960 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:44,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-11-22 21:53:44,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:44,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:44,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:45,218 INFO L124 PetriNetUnfolderBase]: 744/1278 cut-off events. [2024-11-22 21:53:45,219 INFO L125 PetriNetUnfolderBase]: For 2680/2680 co-relation queries the response was YES. [2024-11-22 21:53:45,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4491 conditions, 1278 events. 744/1278 cut-off events. For 2680/2680 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6178 event pairs, 175 based on Foata normal form. 60/1338 useless extension candidates. Maximal degree in co-relation 2943. Up to 594 conditions per place. [2024-11-22 21:53:45,228 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 90 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-11-22 21:53:45,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 119 transitions, 985 flow [2024-11-22 21:53:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-11-22 21:53:45,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-11-22 21:53:45,230 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 350 flow. Second operand 8 states and 191 transitions. [2024-11-22 21:53:45,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 119 transitions, 985 flow [2024-11-22 21:53:45,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 119 transitions, 951 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:45,238 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 611 flow [2024-11-22 21:53:45,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=611, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-11-22 21:53:45,239 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 28 predicate places. [2024-11-22 21:53:45,239 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 611 flow [2024-11-22 21:53:45,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-11-22 21:53:45,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:45,239 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:45,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 21:53:45,239 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:45,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:45,240 INFO L85 PathProgramCache]: Analyzing trace with hash -344928779, now seen corresponding path program 3 times [2024-11-22 21:53:45,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:45,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772948129] [2024-11-22 21:53:45,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:53:45,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:45,255 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:53:45,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:45,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:45,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772948129] [2024-11-22 21:53:45,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772948129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:45,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:45,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444029162] [2024-11-22 21:53:45,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:45,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:45,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:45,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 611 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2024-11-22 21:53:45,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:45,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:45,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:45,575 INFO L124 PetriNetUnfolderBase]: 836/1428 cut-off events. [2024-11-22 21:53:45,576 INFO L125 PetriNetUnfolderBase]: For 5939/5939 co-relation queries the response was YES. [2024-11-22 21:53:45,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6268 conditions, 1428 events. 836/1428 cut-off events. For 5939/5939 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7262 event pairs, 260 based on Foata normal form. 8/1436 useless extension candidates. Maximal degree in co-relation 4062. Up to 686 conditions per place. [2024-11-22 21:53:45,590 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 91 selfloop transitions, 31 changer transitions 1/124 dead transitions. [2024-11-22 21:53:45,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 124 transitions, 1342 flow [2024-11-22 21:53:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-11-22 21:53:45,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-22 21:53:45,591 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 611 flow. Second operand 5 states and 130 transitions. [2024-11-22 21:53:45,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 124 transitions, 1342 flow [2024-11-22 21:53:45,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 124 transitions, 1287 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:45,608 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 923 flow [2024-11-22 21:53:45,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=923, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-11-22 21:53:45,609 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 34 predicate places. [2024-11-22 21:53:45,609 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 923 flow [2024-11-22 21:53:45,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2024-11-22 21:53:45,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:45,609 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:45,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:53:45,609 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:45,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1634187093, now seen corresponding path program 4 times [2024-11-22 21:53:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279386441] [2024-11-22 21:53:45,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:53:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:45,621 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:53:45,622 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:45,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:45,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279386441] [2024-11-22 21:53:45,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279386441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:45,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:45,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:45,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695422848] [2024-11-22 21:53:45,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:45,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:53:45,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:45,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:53:45,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:53:45,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-22 21:53:45,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 923 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:45,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:45,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-22 21:53:45,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:46,084 INFO L124 PetriNetUnfolderBase]: 849/1475 cut-off events. [2024-11-22 21:53:46,085 INFO L125 PetriNetUnfolderBase]: For 7858/7858 co-relation queries the response was YES. [2024-11-22 21:53:46,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6941 conditions, 1475 events. 849/1475 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7517 event pairs, 330 based on Foata normal form. 16/1491 useless extension candidates. Maximal degree in co-relation 4758. Up to 905 conditions per place. [2024-11-22 21:53:46,094 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 48 changer transitions 1/127 dead transitions. [2024-11-22 21:53:46,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 127 transitions, 1535 flow [2024-11-22 21:53:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:53:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:53:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-11-22 21:53:46,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-11-22 21:53:46,096 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 923 flow. Second operand 6 states and 149 transitions. [2024-11-22 21:53:46,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 127 transitions, 1535 flow [2024-11-22 21:53:46,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 1507 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:46,116 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 1318 flow [2024-11-22 21:53:46,117 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1318, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2024-11-22 21:53:46,117 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 42 predicate places. [2024-11-22 21:53:46,117 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 1318 flow [2024-11-22 21:53:46,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:46,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:46,118 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:46,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-22 21:53:46,118 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:46,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2057906583, now seen corresponding path program 5 times [2024-11-22 21:53:46,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:46,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537859390] [2024-11-22 21:53:46,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:53:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:46,130 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:53:46,130 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:46,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:46,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537859390] [2024-11-22 21:53:46,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537859390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:46,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:46,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337457615] [2024-11-22 21:53:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:46,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:53:46,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:53:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:53:46,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:46,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 1318 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:46,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:46,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:46,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:46,553 INFO L124 PetriNetUnfolderBase]: 850/1452 cut-off events. [2024-11-22 21:53:46,554 INFO L125 PetriNetUnfolderBase]: For 9868/9868 co-relation queries the response was YES. [2024-11-22 21:53:46,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7484 conditions, 1452 events. 850/1452 cut-off events. For 9868/9868 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7396 event pairs, 236 based on Foata normal form. 12/1464 useless extension candidates. Maximal degree in co-relation 5230. Up to 706 conditions per place. [2024-11-22 21:53:46,567 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 106 selfloop transitions, 45 changer transitions 1/153 dead transitions. [2024-11-22 21:53:46,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 153 transitions, 1922 flow [2024-11-22 21:53:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:53:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:53:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-11-22 21:53:46,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-22 21:53:46,569 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 1318 flow. Second operand 6 states and 156 transitions. [2024-11-22 21:53:46,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 153 transitions, 1922 flow [2024-11-22 21:53:46,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 153 transitions, 1852 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:46,602 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 1437 flow [2024-11-22 21:53:46,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1437, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2024-11-22 21:53:46,604 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-11-22 21:53:46,604 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 1437 flow [2024-11-22 21:53:46,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:46,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:46,605 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] [2024-11-22 21:53:46,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 21:53:46,605 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:46,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:46,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1203485320, now seen corresponding path program 1 times [2024-11-22 21:53:46,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:46,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62950761] [2024-11-22 21:53:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:46,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:46,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62950761] [2024-11-22 21:53:46,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62950761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624879835] [2024-11-22 21:53:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:46,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:46,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:46,780 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) [2024-11-22 21:53:46,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:53:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:46,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 21:53:46,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:46,878 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 [2024-11-22 21:53:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:46,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:47,123 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 72 treesize of output 64 [2024-11-22 21:53:47,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:53:47,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 129 [2024-11-22 21:53:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624879835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:48,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:48,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2024-11-22 21:53:48,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8632293] [2024-11-22 21:53:48,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:48,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:53:48,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:48,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:53:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:53:48,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-22 21:53:48,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 1437 flow. Second operand has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 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) [2024-11-22 21:53:48,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:48,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-22 21:53:48,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:50,159 INFO L124 PetriNetUnfolderBase]: 2695/4677 cut-off events. [2024-11-22 21:53:50,160 INFO L125 PetriNetUnfolderBase]: For 23729/23729 co-relation queries the response was YES. [2024-11-22 21:53:50,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20689 conditions, 4677 events. 2695/4677 cut-off events. For 23729/23729 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 27479 event pairs, 60 based on Foata normal form. 24/4701 useless extension candidates. Maximal degree in co-relation 18526. Up to 781 conditions per place. [2024-11-22 21:53:50,192 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 282 selfloop transitions, 146 changer transitions 142/572 dead transitions. [2024-11-22 21:53:50,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 572 transitions, 5925 flow [2024-11-22 21:53:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-22 21:53:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-22 21:53:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1157 transitions. [2024-11-22 21:53:50,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6026041666666667 [2024-11-22 21:53:50,196 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 1437 flow. Second operand 48 states and 1157 transitions. [2024-11-22 21:53:50,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 572 transitions, 5925 flow [2024-11-22 21:53:50,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 572 transitions, 5793 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:50,259 INFO L231 Difference]: Finished difference. Result has 149 places, 200 transitions, 2504 flow [2024-11-22 21:53:50,259 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2504, PETRI_PLACES=149, PETRI_TRANSITIONS=200} [2024-11-22 21:53:50,260 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-11-22 21:53:50,260 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 200 transitions, 2504 flow [2024-11-22 21:53:50,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 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) [2024-11-22 21:53:50,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:50,261 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] [2024-11-22 21:53:50,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:53:50,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:50,462 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:50,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash -128894715, now seen corresponding path program 1 times [2024-11-22 21:53:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:50,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812913713] [2024-11-22 21:53:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:50,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:50,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812913713] [2024-11-22 21:53:50,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812913713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:50,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818867905] [2024-11-22 21:53:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:50,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:50,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:50,630 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) [2024-11-22 21:53:50,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:53:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:50,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:53:50,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:50,761 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 [2024-11-22 21:53:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:50,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:50,790 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:53:50,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-22 21:53:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:50,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818867905] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:50,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:53:50,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2024-11-22 21:53:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640255475] [2024-11-22 21:53:50,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:50,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:50,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:53:50,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-22 21:53:50,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 200 transitions, 2504 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2024-11-22 21:53:50,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:50,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-22 21:53:50,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:51,452 INFO L124 PetriNetUnfolderBase]: 2444/4271 cut-off events. [2024-11-22 21:53:51,452 INFO L125 PetriNetUnfolderBase]: For 24958/24958 co-relation queries the response was YES. [2024-11-22 21:53:51,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20247 conditions, 4271 events. 2444/4271 cut-off events. For 24958/24958 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 24800 event pairs, 865 based on Foata normal form. 4/4275 useless extension candidates. Maximal degree in co-relation 20068. Up to 3178 conditions per place. [2024-11-22 21:53:51,544 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 189 selfloop transitions, 56 changer transitions 1/248 dead transitions. [2024-11-22 21:53:51,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 248 transitions, 3411 flow [2024-11-22 21:53:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:53:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:53:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-22 21:53:51,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.725 [2024-11-22 21:53:51,546 INFO L175 Difference]: Start difference. First operand has 149 places, 200 transitions, 2504 flow. Second operand 4 states and 116 transitions. [2024-11-22 21:53:51,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 248 transitions, 3411 flow [2024-11-22 21:53:51,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 248 transitions, 3021 flow, removed 153 selfloop flow, removed 16 redundant places. [2024-11-22 21:53:51,620 INFO L231 Difference]: Finished difference. Result has 127 places, 219 transitions, 2533 flow [2024-11-22 21:53:51,620 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2533, PETRI_PLACES=127, PETRI_TRANSITIONS=219} [2024-11-22 21:53:51,620 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 87 predicate places. [2024-11-22 21:53:51,620 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 219 transitions, 2533 flow [2024-11-22 21:53:51,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2024-11-22 21:53:51,621 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:51,621 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:51,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:53:51,821 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,SelfDestructingSolverStorable20 [2024-11-22 21:53:51,822 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:51,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:51,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1779561111, now seen corresponding path program 2 times [2024-11-22 21:53:51,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:51,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026074664] [2024-11-22 21:53:51,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:51,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:51,887 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:53:51,887 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:52,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:52,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026074664] [2024-11-22 21:53:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026074664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383788041] [2024-11-22 21:53:52,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:52,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:52,045 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) [2024-11-22 21:53:52,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:53:52,155 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:53:52,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:52,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:53:52,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:52,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:52,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383788041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:52,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:52,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2024-11-22 21:53:52,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016885265] [2024-11-22 21:53:52,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:52,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:53:52,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:53:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:53:52,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:52,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 219 transitions, 2533 flow. Second operand has 14 states, 14 states have (on average 16.357142857142858) internal successors, (229), 14 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:52,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:52,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:52,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:53,686 INFO L124 PetriNetUnfolderBase]: 3063/5385 cut-off events. [2024-11-22 21:53:53,686 INFO L125 PetriNetUnfolderBase]: For 24483/24483 co-relation queries the response was YES. [2024-11-22 21:53:53,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23914 conditions, 5385 events. 3063/5385 cut-off events. For 24483/24483 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 32901 event pairs, 541 based on Foata normal form. 15/5400 useless extension candidates. Maximal degree in co-relation 23309. Up to 1536 conditions per place. [2024-11-22 21:53:53,729 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 269 selfloop transitions, 206 changer transitions 4/480 dead transitions. [2024-11-22 21:53:53,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 480 transitions, 5535 flow [2024-11-22 21:53:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 21:53:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-22 21:53:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 576 transitions. [2024-11-22 21:53:53,732 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-22 21:53:53,732 INFO L175 Difference]: Start difference. First operand has 127 places, 219 transitions, 2533 flow. Second operand 27 states and 576 transitions. [2024-11-22 21:53:53,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 480 transitions, 5535 flow [2024-11-22 21:53:53,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 480 transitions, 5487 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-11-22 21:53:53,822 INFO L231 Difference]: Finished difference. Result has 162 places, 311 transitions, 4055 flow [2024-11-22 21:53:53,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4055, PETRI_PLACES=162, PETRI_TRANSITIONS=311} [2024-11-22 21:53:53,823 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 122 predicate places. [2024-11-22 21:53:53,823 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 311 transitions, 4055 flow [2024-11-22 21:53:53,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.357142857142858) internal successors, (229), 14 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:53,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:53,824 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:53,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:53:54,024 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,SelfDestructingSolverStorable21 [2024-11-22 21:53:54,025 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:54,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1588302485, now seen corresponding path program 3 times [2024-11-22 21:53:54,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:54,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487552677] [2024-11-22 21:53:54,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:53:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:54,096 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:53:54,097 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:54,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:54,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487552677] [2024-11-22 21:53:54,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487552677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:54,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768266010] [2024-11-22 21:53:54,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:53:54,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:54,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:54,389 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) [2024-11-22 21:53:54,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:53:54,481 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:53:54,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:54,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:53:54,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:54,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:54,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768266010] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:54,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:54,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-22 21:53:54,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697066665] [2024-11-22 21:53:54,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:54,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:53:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:53:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:53:54,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:54,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 311 transitions, 4055 flow. Second operand has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 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) [2024-11-22 21:53:54,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:54,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:54,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:58,222 INFO L124 PetriNetUnfolderBase]: 6795/11871 cut-off events. [2024-11-22 21:53:58,222 INFO L125 PetriNetUnfolderBase]: For 70862/70862 co-relation queries the response was YES. [2024-11-22 21:53:58,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58640 conditions, 11871 events. 6795/11871 cut-off events. For 70862/70862 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 80926 event pairs, 443 based on Foata normal form. 30/11901 useless extension candidates. Maximal degree in co-relation 55035. Up to 2072 conditions per place. [2024-11-22 21:53:58,303 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 500 selfloop transitions, 698 changer transitions 1/1200 dead transitions. [2024-11-22 21:53:58,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1200 transitions, 15612 flow [2024-11-22 21:53:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-22 21:53:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-11-22 21:53:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1134 transitions. [2024-11-22 21:53:58,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451923076923076 [2024-11-22 21:53:58,306 INFO L175 Difference]: Start difference. First operand has 162 places, 311 transitions, 4055 flow. Second operand 52 states and 1134 transitions. [2024-11-22 21:53:58,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1200 transitions, 15612 flow [2024-11-22 21:53:58,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1200 transitions, 15010 flow, removed 301 selfloop flow, removed 0 redundant places. [2024-11-22 21:53:58,670 INFO L231 Difference]: Finished difference. Result has 250 places, 868 transitions, 12846 flow [2024-11-22 21:53:58,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12846, PETRI_PLACES=250, PETRI_TRANSITIONS=868} [2024-11-22 21:53:58,671 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 210 predicate places. [2024-11-22 21:53:58,671 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 868 transitions, 12846 flow [2024-11-22 21:53:58,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 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) [2024-11-22 21:53:58,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:58,671 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:58,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:53:58,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-22 21:53:58,872 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:58,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash 386298489, now seen corresponding path program 4 times [2024-11-22 21:53:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829687619] [2024-11-22 21:53:58,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:53:58,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:58,887 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:53:58,888 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:59,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829687619] [2024-11-22 21:53:59,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829687619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394777876] [2024-11-22 21:53:59,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:53:59,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:59,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:59,030 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) [2024-11-22 21:53:59,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:53:59,148 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:53:59,148 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:59,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:53:59,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:59,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:59,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394777876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:59,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:59,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2024-11-22 21:53:59,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855064818] [2024-11-22 21:53:59,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:59,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:53:59,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:53:59,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:53:59,417 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:53:59,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 868 transitions, 12846 flow. Second operand has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:59,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:59,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:53:59,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:04,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:07,397 INFO L124 PetriNetUnfolderBase]: 6889/12118 cut-off events. [2024-11-22 21:54:07,397 INFO L125 PetriNetUnfolderBase]: For 150294/150294 co-relation queries the response was YES. [2024-11-22 21:54:07,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78691 conditions, 12118 events. 6889/12118 cut-off events. For 150294/150294 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 84242 event pairs, 1360 based on Foata normal form. 21/12139 useless extension candidates. Maximal degree in co-relation 77814. Up to 4315 conditions per place. [2024-11-22 21:54:07,534 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 644 selfloop transitions, 546 changer transitions 8/1199 dead transitions. [2024-11-22 21:54:07,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1199 transitions, 19099 flow [2024-11-22 21:54:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 21:54:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-22 21:54:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 556 transitions. [2024-11-22 21:54:07,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2024-11-22 21:54:07,537 INFO L175 Difference]: Start difference. First operand has 250 places, 868 transitions, 12846 flow. Second operand 27 states and 556 transitions. [2024-11-22 21:54:07,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1199 transitions, 19099 flow [2024-11-22 21:54:08,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 1199 transitions, 18045 flow, removed 527 selfloop flow, removed 0 redundant places. [2024-11-22 21:54:08,807 INFO L231 Difference]: Finished difference. Result has 286 places, 947 transitions, 14673 flow [2024-11-22 21:54:08,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12058, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14673, PETRI_PLACES=286, PETRI_TRANSITIONS=947} [2024-11-22 21:54:08,808 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 246 predicate places. [2024-11-22 21:54:08,808 INFO L471 AbstractCegarLoop]: Abstraction has has 286 places, 947 transitions, 14673 flow [2024-11-22 21:54:08,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:08,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:08,809 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:08,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 21:54:09,009 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,SelfDestructingSolverStorable23 [2024-11-22 21:54:09,010 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:09,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -349391455, now seen corresponding path program 5 times [2024-11-22 21:54:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111326740] [2024-11-22 21:54:09,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:54:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:09,027 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 21:54:09,028 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:09,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:09,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111326740] [2024-11-22 21:54:09,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111326740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:09,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517565261] [2024-11-22 21:54:09,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:54:09,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:09,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:09,278 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) [2024-11-22 21:54:09,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:54:09,359 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 21:54:09,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:09,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:54:09,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:09,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517565261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:09,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:09,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-22 21:54:09,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137046069] [2024-11-22 21:54:09,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:09,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:54:09,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:09,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:54:09,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:54:09,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:54:09,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 947 transitions, 14673 flow. Second operand has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 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) [2024-11-22 21:54:09,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:09,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:54:09,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:15,359 INFO L124 PetriNetUnfolderBase]: 8169/14483 cut-off events. [2024-11-22 21:54:15,360 INFO L125 PetriNetUnfolderBase]: For 216993/216993 co-relation queries the response was YES. [2024-11-22 21:54:15,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99216 conditions, 14483 events. 8169/14483 cut-off events. For 216993/216993 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 105682 event pairs, 1725 based on Foata normal form. 42/14525 useless extension candidates. Maximal degree in co-relation 97618. Up to 5586 conditions per place. [2024-11-22 21:54:15,473 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 532 selfloop transitions, 1121 changer transitions 1/1655 dead transitions. [2024-11-22 21:54:15,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 1655 transitions, 27145 flow [2024-11-22 21:54:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-22 21:54:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-22 21:54:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 953 transitions. [2024-11-22 21:54:15,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5810975609756097 [2024-11-22 21:54:15,476 INFO L175 Difference]: Start difference. First operand has 286 places, 947 transitions, 14673 flow. Second operand 41 states and 953 transitions. [2024-11-22 21:54:15,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 1655 transitions, 27145 flow [2024-11-22 21:54:17,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1655 transitions, 26149 flow, removed 130 selfloop flow, removed 8 redundant places. [2024-11-22 21:54:17,434 INFO L231 Difference]: Finished difference. Result has 340 places, 1460 transitions, 26103 flow [2024-11-22 21:54:17,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14032, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=690, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=26103, PETRI_PLACES=340, PETRI_TRANSITIONS=1460} [2024-11-22 21:54:17,435 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 300 predicate places. [2024-11-22 21:54:17,435 INFO L471 AbstractCegarLoop]: Abstraction has has 340 places, 1460 transitions, 26103 flow [2024-11-22 21:54:17,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 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) [2024-11-22 21:54:17,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:17,436 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:17,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:17,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:17,636 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:17,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:17,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1181411821, now seen corresponding path program 6 times [2024-11-22 21:54:17,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:17,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24115868] [2024-11-22 21:54:17,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:54:17,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:17,653 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 21:54:17,655 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:17,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:17,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24115868] [2024-11-22 21:54:17,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24115868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:17,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117986720] [2024-11-22 21:54:17,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:54:17,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:17,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:17,798 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) [2024-11-22 21:54:17,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:54:17,870 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 21:54:17,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:17,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:54:17,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:17,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:18,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117986720] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:18,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:18,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-11-22 21:54:18,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881872863] [2024-11-22 21:54:18,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:18,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:54:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:18,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:54:18,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:54:18,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:54:18,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1460 transitions, 26103 flow. Second operand has 17 states, 17 states have (on average 16.11764705882353) internal successors, (274), 17 states have internal predecessors, (274), 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) [2024-11-22 21:54:18,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:18,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:54:18,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:24,291 INFO L124 PetriNetUnfolderBase]: 8477/14968 cut-off events. [2024-11-22 21:54:24,292 INFO L125 PetriNetUnfolderBase]: For 288800/288800 co-relation queries the response was YES. [2024-11-22 21:54:24,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114880 conditions, 14968 events. 8477/14968 cut-off events. For 288800/288800 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 109073 event pairs, 1942 based on Foata normal form. 162/15130 useless extension candidates. Maximal degree in co-relation 113663. Up to 6075 conditions per place. [2024-11-22 21:54:24,585 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 951 selfloop transitions, 793 changer transitions 1/1746 dead transitions. [2024-11-22 21:54:24,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1746 transitions, 33247 flow [2024-11-22 21:54:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-22 21:54:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-22 21:54:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 649 transitions. [2024-11-22 21:54:24,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5594827586206896 [2024-11-22 21:54:24,588 INFO L175 Difference]: Start difference. First operand has 340 places, 1460 transitions, 26103 flow. Second operand 29 states and 649 transitions. [2024-11-22 21:54:24,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1746 transitions, 33247 flow [2024-11-22 21:54:28,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1746 transitions, 31018 flow, removed 779 selfloop flow, removed 7 redundant places. [2024-11-22 21:54:29,002 INFO L231 Difference]: Finished difference. Result has 371 places, 1545 transitions, 28150 flow [2024-11-22 21:54:29,003 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=23400, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=672, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=28150, PETRI_PLACES=371, PETRI_TRANSITIONS=1545} [2024-11-22 21:54:29,003 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 331 predicate places. [2024-11-22 21:54:29,003 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 1545 transitions, 28150 flow [2024-11-22 21:54:29,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.11764705882353) internal successors, (274), 17 states have internal predecessors, (274), 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) [2024-11-22 21:54:29,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:29,004 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:29,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:29,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-22 21:54:29,204 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:29,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1317413601, now seen corresponding path program 7 times [2024-11-22 21:54:29,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:29,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155818254] [2024-11-22 21:54:29,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:54:29,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:54:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:29,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:29,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155818254] [2024-11-22 21:54:29,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155818254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:29,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485630913] [2024-11-22 21:54:29,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:54:29,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:29,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:29,357 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) [2024-11-22 21:54:29,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:54:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:54:29,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:54:29,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:29,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:29,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485630913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:29,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:29,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-22 21:54:29,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417518054] [2024-11-22 21:54:29,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:29,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:54:29,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:54:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:54:29,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:54:29,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1545 transitions, 28150 flow. Second operand has 15 states, 15 states have (on average 16.0) internal successors, (240), 15 states have internal predecessors, (240), 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) [2024-11-22 21:54:29,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:29,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:54:29,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:37,370 INFO L124 PetriNetUnfolderBase]: 9436/16685 cut-off events. [2024-11-22 21:54:37,370 INFO L125 PetriNetUnfolderBase]: For 290416/290416 co-relation queries the response was YES. [2024-11-22 21:54:37,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129157 conditions, 16685 events. 9436/16685 cut-off events. For 290416/290416 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 124044 event pairs, 2376 based on Foata normal form. 27/16712 useless extension candidates. Maximal degree in co-relation 128269. Up to 8469 conditions per place. [2024-11-22 21:54:37,587 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 670 selfloop transitions, 1351 changer transitions 5/2027 dead transitions. [2024-11-22 21:54:37,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 2027 transitions, 39965 flow [2024-11-22 21:54:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-22 21:54:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-22 21:54:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 818 transitions. [2024-11-22 21:54:37,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5243589743589744 [2024-11-22 21:54:37,590 INFO L175 Difference]: Start difference. First operand has 371 places, 1545 transitions, 28150 flow. Second operand 39 states and 818 transitions. [2024-11-22 21:54:37,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 2027 transitions, 39965 flow [2024-11-22 21:54:41,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 2027 transitions, 39651 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-11-22 21:54:41,307 INFO L231 Difference]: Finished difference. Result has 424 places, 1872 transitions, 39385 flow [2024-11-22 21:54:41,308 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=27873, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=39385, PETRI_PLACES=424, PETRI_TRANSITIONS=1872} [2024-11-22 21:54:41,309 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 384 predicate places. [2024-11-22 21:54:41,309 INFO L471 AbstractCegarLoop]: Abstraction has has 424 places, 1872 transitions, 39385 flow [2024-11-22 21:54:41,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.0) internal successors, (240), 15 states have internal predecessors, (240), 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) [2024-11-22 21:54:41,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:41,309 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:41,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:41,509 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,SelfDestructingSolverStorable26 [2024-11-22 21:54:41,510 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:41,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash 578641119, now seen corresponding path program 8 times [2024-11-22 21:54:41,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:41,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309479774] [2024-11-22 21:54:41,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:54:41,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:41,527 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:54:41,527 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:41,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:41,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309479774] [2024-11-22 21:54:41,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309479774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:41,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906714944] [2024-11-22 21:54:41,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:54:41,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:41,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:41,744 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) [2024-11-22 21:54:41,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:54:41,833 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:54:41,833 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:41,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:54:41,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:41,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:42,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906714944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:42,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:42,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-11-22 21:54:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212593635] [2024-11-22 21:54:42,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:42,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:54:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:54:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:54:42,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-22 21:54:42,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1872 transitions, 39385 flow. Second operand has 18 states, 18 states have (on average 15.944444444444445) internal successors, (287), 18 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) [2024-11-22 21:54:42,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:42,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-22 21:54:42,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:51,128 INFO L124 PetriNetUnfolderBase]: 9900/17498 cut-off events. [2024-11-22 21:54:51,128 INFO L125 PetriNetUnfolderBase]: For 377633/377633 co-relation queries the response was YES. [2024-11-22 21:54:51,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149290 conditions, 17498 events. 9900/17498 cut-off events. For 377633/377633 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 131420 event pairs, 2352 based on Foata normal form. 170/17668 useless extension candidates. Maximal degree in co-relation 148949. Up to 8362 conditions per place. [2024-11-22 21:54:51,319 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 1021 selfloop transitions, 1211 changer transitions 4/2237 dead transitions. [2024-11-22 21:54:51,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 2237 transitions, 50270 flow [2024-11-22 21:54:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-22 21:54:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-22 21:54:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 680 transitions. [2024-11-22 21:54:51,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-22 21:54:51,321 INFO L175 Difference]: Start difference. First operand has 424 places, 1872 transitions, 39385 flow. Second operand 31 states and 680 transitions. [2024-11-22 21:54:51,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 2237 transitions, 50270 flow