./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-trans.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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:46:03,592 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:46:03,657 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:46:03,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:46:03,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:46:03,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:46:03,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:46:03,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:46:03,683 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:46:03,684 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:46:03,684 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:46:03,684 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:46:03,685 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:46:03,685 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:46:03,686 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:46:03,686 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:46:03,687 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:46:03,687 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:46:03,687 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:46:03,687 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:46:03,687 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:46:03,688 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:46:03,690 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:46:03,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:46:03,691 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:46:03,691 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:46:03,691 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:46:03,691 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:46:03,691 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:46:03,691 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:46:03,691 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:46:03,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:46:03,692 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:46:03,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:46:03,692 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:46:03,692 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:46:03,692 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:46:03,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:46:03,693 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:46:03,693 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:46:03,693 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:46:03,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:46:03,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-11-09 10:46:03,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:46:03,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:46:03,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:46:03,917 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:46:03,917 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:46:03,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-09 10:46:05,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:46:05,365 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:46:05,366 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-09 10:46:05,376 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a203a57/a671b80741844ded9d2930df40e22be7/FLAGef589ceae [2024-11-09 10:46:05,394 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a203a57/a671b80741844ded9d2930df40e22be7 [2024-11-09 10:46:05,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:46:05,398 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:46:05,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:46:05,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:46:05,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:46:05,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fae2f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05, skipping insertion in model container [2024-11-09 10:46:05,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,452 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:46:05,655 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:46:05,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:46:05,674 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:46:05,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:46:05,718 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:46:05,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05 WrapperNode [2024-11-09 10:46:05,718 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:46:05,719 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:46:05,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:46:05,720 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:46:05,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,759 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 269 [2024-11-09 10:46:05,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:46:05,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:46:05,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:46:05,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:46:05,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,793 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-09 10:46:05,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,804 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:46:05,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:46:05,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:46:05,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:46:05,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (1/1) ... [2024-11-09 10:46:05,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:46:05,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:05,845 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) [2024-11-09 10:46:05,847 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 [2024-11-09 10:46:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:46:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:46:05,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:46:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:46:05,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:46:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:46:05,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:46:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:46:05,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:46:05,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:46:05,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:46:05,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:46:05,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:46:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:46:05,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:46:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:46:05,885 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:46:05,983 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:46:05,984 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:46:06,343 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:46:06,343 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:46:06,654 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:46:06,654 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:46:06,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:06 BoogieIcfgContainer [2024-11-09 10:46:06,655 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:46:06,659 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:46:06,662 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:46:06,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:46:06,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:46:05" (1/3) ... [2024-11-09 10:46:06,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2827871d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:06, skipping insertion in model container [2024-11-09 10:46:06,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:05" (2/3) ... [2024-11-09 10:46:06,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2827871d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:06, skipping insertion in model container [2024-11-09 10:46:06,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:06" (3/3) ... [2024-11-09 10:46:06,692 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-11-09 10:46:06,712 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:46:06,712 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-09 10:46:06,713 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:46:06,766 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:46:06,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-09 10:46:06,823 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-09 10:46:06,824 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:46:06,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 150 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-09 10:46:06,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-09 10:46:06,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-09 10:46:06,845 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:46:06,852 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;@5bf11165, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:46:06,853 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-09 10:46:06,855 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:46:06,856 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:46:06,856 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:46:06,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:06,857 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:46:06,857 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:06,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:06,861 INFO L85 PathProgramCache]: Analyzing trace with hash 867015, now seen corresponding path program 1 times [2024-11-09 10:46:06,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:06,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402544913] [2024-11-09 10:46:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:06,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:07,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:07,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402544913] [2024-11-09 10:46:07,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402544913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:07,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:07,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:46:07,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974601741] [2024-11-09 10:46:07,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:07,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:46:07,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:46:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:46:07,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:07,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:07,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:07,306 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-11-09 10:46:07,306 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-09 10:46:07,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 443 events. 202/443 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2067 event pairs, 124 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 672. Up to 293 conditions per place. [2024-11-09 10:46:07,311 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-09 10:46:07,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-11-09 10:46:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:46:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:46:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-09 10:46:07,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-09 10:46:07,323 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-11-09 10:46:07,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-11-09 10:46:07,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:07,329 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-09 10:46:07,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-09 10:46:07,333 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-09 10:46:07,334 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-09 10:46:07,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:07,334 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:46:07,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:46:07,334 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:07,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:07,335 INFO L85 PathProgramCache]: Analyzing trace with hash 867016, now seen corresponding path program 1 times [2024-11-09 10:46:07,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:07,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304287498] [2024-11-09 10:46:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:07,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:07,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304287498] [2024-11-09 10:46:07,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304287498] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:07,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:07,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:46:07,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819655528] [2024-11-09 10:46:07,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:07,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:07,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:07,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:07,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:07,557 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:07,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:07,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:07,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:07,720 INFO L124 PetriNetUnfolderBase]: 202/449 cut-off events. [2024-11-09 10:46:07,721 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:46:07,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 449 events. 202/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2068 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 734. Up to 305 conditions per place. [2024-11-09 10:46:07,724 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-09 10:46:07,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2024-11-09 10:46:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:46:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:46:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-09 10:46:07,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-11-09 10:46:07,729 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-11-09 10:46:07,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2024-11-09 10:46:07,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:07,732 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2024-11-09 10:46:07,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-11-09 10:46:07,733 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-09 10:46:07,733 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2024-11-09 10:46:07,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:07,734 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:46:07,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:46:07,734 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:07,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash 833230439, now seen corresponding path program 1 times [2024-11-09 10:46:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:07,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413775875] [2024-11-09 10:46:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:07,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:07,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413775875] [2024-11-09 10:46:07,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413775875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170917416] [2024-11-09 10:46:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:07,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:07,948 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) [2024-11-09 10:46:07,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:46:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:08,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:46:08,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:08,068 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 6 treesize of output 5 [2024-11-09 10:46:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:08,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:08,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170917416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:08,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:08,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-09 10:46:08,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452350818] [2024-11-09 10:46:08,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:08,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:46:08,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:46:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:46:08,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:08,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2024-11-09 10:46:08,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:08,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:08,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:08,598 INFO L124 PetriNetUnfolderBase]: 211/476 cut-off events. [2024-11-09 10:46:08,598 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:46:08,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 476 events. 211/476 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2191 event pairs, 124 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 769. Up to 308 conditions per place. [2024-11-09 10:46:08,602 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2024-11-09 10:46:08,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 378 flow [2024-11-09 10:46:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-09 10:46:08,604 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-09 10:46:08,604 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2024-11-09 10:46:08,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 378 flow [2024-11-09 10:46:08,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:46:08,606 INFO L231 Difference]: Finished difference. Result has 59 places, 72 transitions, 313 flow [2024-11-09 10:46:08,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=59, PETRI_TRANSITIONS=72} [2024-11-09 10:46:08,607 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-11-09 10:46:08,607 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 72 transitions, 313 flow [2024-11-09 10:46:08,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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) [2024-11-09 10:46:08,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:08,608 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-09 10:46:08,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:08,808 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 [2024-11-09 10:46:08,809 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:08,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:08,809 INFO L85 PathProgramCache]: Analyzing trace with hash -431889724, now seen corresponding path program 2 times [2024-11-09 10:46:08,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:08,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038992890] [2024-11-09 10:46:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:08,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:09,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:09,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038992890] [2024-11-09 10:46:09,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038992890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:09,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387423725] [2024-11-09 10:46:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:46:09,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:09,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:09,062 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) [2024-11-09 10:46:09,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:46:09,125 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:46:09,125 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:46:09,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:46:09,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:09,132 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 6 treesize of output 5 [2024-11-09 10:46:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:09,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:09,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387423725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:09,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:09,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-09 10:46:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674336787] [2024-11-09 10:46:09,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:09,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:46:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:46:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:46:10,187 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:10,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 313 flow. Second operand has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 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) [2024-11-09 10:46:10,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:10,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:10,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:10,646 INFO L124 PetriNetUnfolderBase]: 214/485 cut-off events. [2024-11-09 10:46:10,647 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-09 10:46:10,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 485 events. 214/485 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2263 event pairs, 124 based on Foata normal form. 3/407 useless extension candidates. Maximal degree in co-relation 813. Up to 309 conditions per place. [2024-11-09 10:46:10,653 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 44 selfloop transitions, 30 changer transitions 0/93 dead transitions. [2024-11-09 10:46:10,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 527 flow [2024-11-09 10:46:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:46:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:46:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-11-09 10:46:10,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-09 10:46:10,655 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 313 flow. Second operand 7 states and 259 transitions. [2024-11-09 10:46:10,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 527 flow [2024-11-09 10:46:10,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 489 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-09 10:46:10,658 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 394 flow [2024-11-09 10:46:10,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2024-11-09 10:46:10,659 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-11-09 10:46:10,659 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 394 flow [2024-11-09 10:46:10,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 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) [2024-11-09 10:46:10,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:10,660 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-11-09 10:46:10,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:10,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-09 10:46:10,861 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:10,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1565831011, now seen corresponding path program 3 times [2024-11-09 10:46:10,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:10,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907661055] [2024-11-09 10:46:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:10,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:10,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:10,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907661055] [2024-11-09 10:46:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907661055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:10,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747680406] [2024-11-09 10:46:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:46:10,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:10,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:10,939 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) [2024-11-09 10:46:10,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:46:11,005 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:46:11,005 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:46:11,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:46:11,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:11,012 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 6 treesize of output 5 [2024-11-09 10:46:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 10:46:11,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 10:46:11,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747680406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:11,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:11,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-11-09 10:46:11,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284955691] [2024-11-09 10:46:11,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:11,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:46:11,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:46:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:46:11,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:11,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 394 flow. Second operand has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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) [2024-11-09 10:46:11,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:11,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:11,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:11,837 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2024-11-09 10:46:11,837 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-09 10:46:11,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 473 events. 208/473 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2139 event pairs, 124 based on Foata normal form. 6/398 useless extension candidates. Maximal degree in co-relation 837. Up to 296 conditions per place. [2024-11-09 10:46:11,840 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 25 selfloop transitions, 37 changer transitions 0/81 dead transitions. [2024-11-09 10:46:11,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 459 flow [2024-11-09 10:46:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:46:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:46:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 354 transitions. [2024-11-09 10:46:11,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-11-09 10:46:11,841 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 394 flow. Second operand 11 states and 354 transitions. [2024-11-09 10:46:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 459 flow [2024-11-09 10:46:11,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 369 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-09 10:46:11,844 INFO L231 Difference]: Finished difference. Result has 64 places, 81 transitions, 331 flow [2024-11-09 10:46:11,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=331, PETRI_PLACES=64, PETRI_TRANSITIONS=81} [2024-11-09 10:46:11,844 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-11-09 10:46:11,845 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 81 transitions, 331 flow [2024-11-09 10:46:11,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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) [2024-11-09 10:46:11,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:11,845 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:11,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:46:12,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:12,046 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:12,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:12,046 INFO L85 PathProgramCache]: Analyzing trace with hash -590761488, now seen corresponding path program 1 times [2024-11-09 10:46:12,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198856793] [2024-11-09 10:46:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:46:12,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:12,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198856793] [2024-11-09 10:46:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198856793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027779495] [2024-11-09 10:46:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:12,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:12,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:12,137 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) [2024-11-09 10:46:12,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:46:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:12,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:46:12,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:46:12,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:46:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027779495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:12,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:12,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 10:46:12,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393789373] [2024-11-09 10:46:12,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:12,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:46:12,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:12,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:46:12,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:46:12,307 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-09 10:46:12,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 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) [2024-11-09 10:46:12,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:12,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-09 10:46:12,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:12,448 INFO L124 PetriNetUnfolderBase]: 199/464 cut-off events. [2024-11-09 10:46:12,449 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-09 10:46:12,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 464 events. 199/464 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2056 event pairs, 124 based on Foata normal form. 9/392 useless extension candidates. Maximal degree in co-relation 739. Up to 296 conditions per place. [2024-11-09 10:46:12,452 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 35 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-11-09 10:46:12,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 376 flow [2024-11-09 10:46:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:46:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:46:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 265 transitions. [2024-11-09 10:46:12,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-09 10:46:12,454 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 331 flow. Second operand 7 states and 265 transitions. [2024-11-09 10:46:12,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 376 flow [2024-11-09 10:46:12,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 322 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-09 10:46:12,459 INFO L231 Difference]: Finished difference. Result has 61 places, 72 transitions, 252 flow [2024-11-09 10:46:12,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=72} [2024-11-09 10:46:12,459 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-09 10:46:12,459 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 72 transitions, 252 flow [2024-11-09 10:46:12,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 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) [2024-11-09 10:46:12,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:12,460 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:12,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:12,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:12,660 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:12,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -929484259, now seen corresponding path program 2 times [2024-11-09 10:46:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:12,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838619596] [2024-11-09 10:46:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:12,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 10:46:12,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:12,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838619596] [2024-11-09 10:46:12,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838619596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:12,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:12,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:46:12,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787566708] [2024-11-09 10:46:12,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:12,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:46:12,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:46:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:46:12,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-09 10:46:12,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2024-11-09 10:46:12,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:12,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-09 10:46:12,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:13,059 INFO L124 PetriNetUnfolderBase]: 325/634 cut-off events. [2024-11-09 10:46:13,060 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-09 10:46:13,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 634 events. 325/634 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2770 event pairs, 221 based on Foata normal form. 0/587 useless extension candidates. Maximal degree in co-relation 1090. Up to 472 conditions per place. [2024-11-09 10:46:13,063 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-09 10:46:13,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 358 flow [2024-11-09 10:46:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:46:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:46:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-09 10:46:13,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-09 10:46:13,064 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 252 flow. Second operand 5 states and 143 transitions. [2024-11-09 10:46:13,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 358 flow [2024-11-09 10:46:13,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 322 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:13,066 INFO L231 Difference]: Finished difference. Result has 57 places, 70 transitions, 218 flow [2024-11-09 10:46:13,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=70} [2024-11-09 10:46:13,066 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2024-11-09 10:46:13,066 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 70 transitions, 218 flow [2024-11-09 10:46:13,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2024-11-09 10:46:13,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:13,067 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:13,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:46:13,067 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:13,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:13,067 INFO L85 PathProgramCache]: Analyzing trace with hash -929484258, now seen corresponding path program 1 times [2024-11-09 10:46:13,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:13,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276484263] [2024-11-09 10:46:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:13,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 10:46:13,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:13,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276484263] [2024-11-09 10:46:13,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276484263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:13,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92552956] [2024-11-09 10:46:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:13,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:13,568 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) [2024-11-09 10:46:13,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:46:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:13,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 10:46:13,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:13,680 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 [2024-11-09 10:46:13,683 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 6 treesize of output 5 [2024-11-09 10:46:13,768 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 10:46:13,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 10:46:13,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:46:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:46:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:46:14,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-09 10:46:14,143 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-09 10:46:14,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 10:46:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:14,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:15,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92552956] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:15,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 25 [2024-11-09 10:46:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771927056] [2024-11-09 10:46:15,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:15,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:46:15,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:46:15,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-09 10:46:15,570 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:15,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 218 flow. Second operand has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 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) [2024-11-09 10:46:15,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:15,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:15,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:16,002 INFO L124 PetriNetUnfolderBase]: 575/1059 cut-off events. [2024-11-09 10:46:16,002 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:46:16,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1059 events. 575/1059 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5215 event pairs, 221 based on Foata normal form. 0/951 useless extension candidates. Maximal degree in co-relation 1889. Up to 440 conditions per place. [2024-11-09 10:46:16,007 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 67 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2024-11-09 10:46:16,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 407 flow [2024-11-09 10:46:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:46:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:46:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-11-09 10:46:16,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-11-09 10:46:16,009 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 218 flow. Second operand 7 states and 233 transitions. [2024-11-09 10:46:16,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 407 flow [2024-11-09 10:46:16,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 402 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:46:16,010 INFO L231 Difference]: Finished difference. Result has 62 places, 71 transitions, 240 flow [2024-11-09 10:46:16,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2024-11-09 10:46:16,011 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-09 10:46:16,011 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 240 flow [2024-11-09 10:46:16,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 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) [2024-11-09 10:46:16,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:16,011 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:16,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:16,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:16,213 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:16,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1250759900, now seen corresponding path program 1 times [2024-11-09 10:46:16,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:16,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950992929] [2024-11-09 10:46:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:16,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:16,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950992929] [2024-11-09 10:46:16,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950992929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:16,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100527301] [2024-11-09 10:46:16,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:16,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:16,605 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) [2024-11-09 10:46:16,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:46:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:16,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 10:46:16,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:16,723 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 6 treesize of output 5 [2024-11-09 10:46:16,728 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 [2024-11-09 10:46:16,790 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:16,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:46:16,800 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:16,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:17,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100527301] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:17,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:17,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-09 10:46:17,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59700920] [2024-11-09 10:46:17,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:17,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:46:17,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:17,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:46:17,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:46:17,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-09 10:46:17,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-11-09 10:46:17,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:17,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-09 10:46:17,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:17,789 INFO L124 PetriNetUnfolderBase]: 397/811 cut-off events. [2024-11-09 10:46:17,789 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-11-09 10:46:17,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 811 events. 397/811 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3976 event pairs, 169 based on Foata normal form. 26/761 useless extension candidates. Maximal degree in co-relation 1571. Up to 377 conditions per place. [2024-11-09 10:46:17,794 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 66 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2024-11-09 10:46:17,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 425 flow [2024-11-09 10:46:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-09 10:46:17,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-09 10:46:17,807 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 240 flow. Second operand 6 states and 216 transitions. [2024-11-09 10:46:17,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 425 flow [2024-11-09 10:46:17,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 88 transitions, 414 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:46:17,810 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 251 flow [2024-11-09 10:46:17,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2024-11-09 10:46:17,811 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-11-09 10:46:17,812 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 251 flow [2024-11-09 10:46:17,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-11-09 10:46:17,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:17,813 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:17,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:18,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:18,013 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:18,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1250759899, now seen corresponding path program 1 times [2024-11-09 10:46:18,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:18,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291007582] [2024-11-09 10:46:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:18,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 10:46:18,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:18,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291007582] [2024-11-09 10:46:18,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291007582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:18,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:18,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:18,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62976114] [2024-11-09 10:46:18,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:18,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:46:18,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:46:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:46:18,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-09 10:46:18,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2024-11-09 10:46:18,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:18,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-09 10:46:18,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:18,308 INFO L124 PetriNetUnfolderBase]: 445/917 cut-off events. [2024-11-09 10:46:18,308 INFO L125 PetriNetUnfolderBase]: For 539/594 co-relation queries the response was YES. [2024-11-09 10:46:18,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1984 conditions, 917 events. 445/917 cut-off events. For 539/594 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4910 event pairs, 315 based on Foata normal form. 62/875 useless extension candidates. Maximal degree in co-relation 1872. Up to 650 conditions per place. [2024-11-09 10:46:18,312 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-09 10:46:18,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 357 flow [2024-11-09 10:46:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:46:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:46:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-09 10:46:18,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-09 10:46:18,314 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 251 flow. Second operand 5 states and 147 transitions. [2024-11-09 10:46:18,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 357 flow [2024-11-09 10:46:18,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 349 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:18,315 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 245 flow [2024-11-09 10:46:18,315 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2024-11-09 10:46:18,315 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-09 10:46:18,316 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 245 flow [2024-11-09 10:46:18,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2024-11-09 10:46:18,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:18,316 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:18,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:46:18,316 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:18,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 69792213, now seen corresponding path program 1 times [2024-11-09 10:46:18,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:18,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190727114] [2024-11-09 10:46:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:18,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:18,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190727114] [2024-11-09 10:46:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190727114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:18,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893105503] [2024-11-09 10:46:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:18,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:18,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:18,634 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) [2024-11-09 10:46:18,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:46:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:18,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 10:46:18,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:18,750 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 6 treesize of output 5 [2024-11-09 10:46:18,755 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 [2024-11-09 10:46:18,813 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:18,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:18,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:46:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:19,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:19,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893105503] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:19,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:19,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-09 10:46:19,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259130256] [2024-11-09 10:46:19,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:19,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:46:19,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:46:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:46:19,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-09 10:46:19,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 245 flow. Second operand has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 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) [2024-11-09 10:46:19,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:19,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-09 10:46:19,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:19,741 INFO L124 PetriNetUnfolderBase]: 772/1467 cut-off events. [2024-11-09 10:46:19,741 INFO L125 PetriNetUnfolderBase]: For 712/815 co-relation queries the response was YES. [2024-11-09 10:46:19,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3182 conditions, 1467 events. 772/1467 cut-off events. For 712/815 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8295 event pairs, 315 based on Foata normal form. 0/1278 useless extension candidates. Maximal degree in co-relation 3070. Up to 604 conditions per place. [2024-11-09 10:46:19,749 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 66 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-11-09 10:46:19,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 440 flow [2024-11-09 10:46:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-11-09 10:46:19,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-11-09 10:46:19,750 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 245 flow. Second operand 6 states and 209 transitions. [2024-11-09 10:46:19,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 440 flow [2024-11-09 10:46:19,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 435 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:46:19,752 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 265 flow [2024-11-09 10:46:19,752 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2024-11-09 10:46:19,752 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-11-09 10:46:19,752 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 265 flow [2024-11-09 10:46:19,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 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) [2024-11-09 10:46:19,752 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:19,752 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:19,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:46:19,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:19,958 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:19,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2131407859, now seen corresponding path program 1 times [2024-11-09 10:46:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:19,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690455329] [2024-11-09 10:46:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 10:46:20,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690455329] [2024-11-09 10:46:20,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690455329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:20,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:20,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:46:20,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453564892] [2024-11-09 10:46:20,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:20,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:20,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:20,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-09 10:46:20,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:20,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:20,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-09 10:46:20,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:20,183 INFO L124 PetriNetUnfolderBase]: 517/1052 cut-off events. [2024-11-09 10:46:20,183 INFO L125 PetriNetUnfolderBase]: For 751/853 co-relation queries the response was YES. [2024-11-09 10:46:20,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 1052 events. 517/1052 cut-off events. For 751/853 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5713 event pairs, 406 based on Foata normal form. 36/1012 useless extension candidates. Maximal degree in co-relation 2369. Up to 773 conditions per place. [2024-11-09 10:46:20,189 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 52 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-09 10:46:20,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 369 flow [2024-11-09 10:46:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-09 10:46:20,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-09 10:46:20,190 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 265 flow. Second operand 4 states and 127 transitions. [2024-11-09 10:46:20,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 369 flow [2024-11-09 10:46:20,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 361 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:20,192 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 257 flow [2024-11-09 10:46:20,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2024-11-09 10:46:20,192 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-09 10:46:20,192 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 257 flow [2024-11-09 10:46:20,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:20,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:20,193 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:20,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:46:20,193 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:20,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:20,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2131407858, now seen corresponding path program 1 times [2024-11-09 10:46:20,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:20,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210887290] [2024-11-09 10:46:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:20,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:20,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:20,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210887290] [2024-11-09 10:46:20,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210887290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:20,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534358875] [2024-11-09 10:46:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:20,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:20,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:20,450 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) [2024-11-09 10:46:20,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:46:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:20,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:46:20,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:20,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:20,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:46:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534358875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:20,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:20,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 10:46:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054995072] [2024-11-09 10:46:20,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:20,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 10:46:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 10:46:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:46:21,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-09 10:46:21,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 257 flow. Second operand has 25 states, 25 states have (on average 30.24) internal successors, (756), 25 states have internal predecessors, (756), 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) [2024-11-09 10:46:21,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:21,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-09 10:46:21,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:21,617 INFO L124 PetriNetUnfolderBase]: 885/1710 cut-off events. [2024-11-09 10:46:21,617 INFO L125 PetriNetUnfolderBase]: For 1030/1149 co-relation queries the response was YES. [2024-11-09 10:46:21,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 1710 events. 885/1710 cut-off events. For 1030/1149 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9824 event pairs, 315 based on Foata normal form. 92/1720 useless extension candidates. Maximal degree in co-relation 4021. Up to 650 conditions per place. [2024-11-09 10:46:21,626 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 68 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2024-11-09 10:46:21,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 539 flow [2024-11-09 10:46:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:46:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:46:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-09 10:46:21,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-11-09 10:46:21,628 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 257 flow. Second operand 10 states and 366 transitions. [2024-11-09 10:46:21,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 539 flow [2024-11-09 10:46:21,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 536 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:21,630 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 312 flow [2024-11-09 10:46:21,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-11-09 10:46:21,631 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-11-09 10:46:21,631 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 312 flow [2024-11-09 10:46:21,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.24) internal successors, (756), 25 states have internal predecessors, (756), 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) [2024-11-09 10:46:21,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:21,633 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:21,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:21,833 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 [2024-11-09 10:46:21,833 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:21,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash -610549791, now seen corresponding path program 1 times [2024-11-09 10:46:21,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:21,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918228930] [2024-11-09 10:46:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:21,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:22,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:22,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918228930] [2024-11-09 10:46:22,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918228930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:22,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134208696] [2024-11-09 10:46:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:22,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:22,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:22,390 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) [2024-11-09 10:46:22,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:46:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:22,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 10:46:22,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:22,515 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 6 treesize of output 5 [2024-11-09 10:46:22,520 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 [2024-11-09 10:46:22,572 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:22,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:22,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:46:22,636 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:22,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:46:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:22,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:23,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134208696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:23,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:23,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2024-11-09 10:46:23,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807067276] [2024-11-09 10:46:23,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:23,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 10:46:23,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:23,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 10:46:23,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 10:46:24,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-09 10:46:24,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 312 flow. Second operand has 35 states, 35 states have (on average 23.057142857142857) internal successors, (807), 35 states have internal predecessors, (807), 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) [2024-11-09 10:46:24,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:24,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-09 10:46:24,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:25,611 INFO L124 PetriNetUnfolderBase]: 2551/4454 cut-off events. [2024-11-09 10:46:25,611 INFO L125 PetriNetUnfolderBase]: For 4865/4991 co-relation queries the response was YES. [2024-11-09 10:46:25,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11977 conditions, 4454 events. 2551/4454 cut-off events. For 4865/4991 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 27233 event pairs, 433 based on Foata normal form. 174/4511 useless extension candidates. Maximal degree in co-relation 11845. Up to 861 conditions per place. [2024-11-09 10:46:25,634 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 131 selfloop transitions, 19 changer transitions 0/162 dead transitions. [2024-11-09 10:46:25,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 162 transitions, 960 flow [2024-11-09 10:46:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:46:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:46:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 532 transitions. [2024-11-09 10:46:25,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-09 10:46:25,636 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 312 flow. Second operand 19 states and 532 transitions. [2024-11-09 10:46:25,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 162 transitions, 960 flow [2024-11-09 10:46:25,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 162 transitions, 929 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:25,640 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 364 flow [2024-11-09 10:46:25,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=364, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2024-11-09 10:46:25,641 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2024-11-09 10:46:25,641 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 364 flow [2024-11-09 10:46:25,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 23.057142857142857) internal successors, (807), 35 states have internal predecessors, (807), 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) [2024-11-09 10:46:25,641 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:25,642 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:25,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:46:25,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 10:46:25,842 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:25,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1681778331, now seen corresponding path program 1 times [2024-11-09 10:46:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:25,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849099419] [2024-11-09 10:46:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:25,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:26,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849099419] [2024-11-09 10:46:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849099419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919870874] [2024-11-09 10:46:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:26,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:26,367 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) [2024-11-09 10:46:26,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:46:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:26,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 10:46:26,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:26,503 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 [2024-11-09 10:46:26,505 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 6 treesize of output 5 [2024-11-09 10:46:26,576 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 10:46:26,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 10:46:26,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:46:26,704 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:26,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:46:26,716 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-09 10:46:26,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 10:46:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:26,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:27,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919870874] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:27,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:27,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 28 [2024-11-09 10:46:27,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265131299] [2024-11-09 10:46:27,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:27,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:46:27,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:46:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2024-11-09 10:46:27,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:27,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 364 flow. Second operand has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 11 states have internal predecessors, (311), 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) [2024-11-09 10:46:27,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:27,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:27,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:28,667 INFO L124 PetriNetUnfolderBase]: 4996/8536 cut-off events. [2024-11-09 10:46:28,667 INFO L125 PetriNetUnfolderBase]: For 15581/16050 co-relation queries the response was YES. [2024-11-09 10:46:28,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24564 conditions, 8536 events. 4996/8536 cut-off events. For 15581/16050 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 59269 event pairs, 2535 based on Foata normal form. 0/8222 useless extension candidates. Maximal degree in co-relation 24431. Up to 4170 conditions per place. [2024-11-09 10:46:28,710 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 79 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-11-09 10:46:28,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 671 flow [2024-11-09 10:46:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:46:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:46:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-09 10:46:28,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-11-09 10:46:28,711 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 364 flow. Second operand 7 states and 229 transitions. [2024-11-09 10:46:28,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 671 flow [2024-11-09 10:46:28,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 664 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:46:28,721 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 386 flow [2024-11-09 10:46:28,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2024-11-09 10:46:28,721 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-09 10:46:28,721 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 386 flow [2024-11-09 10:46:28,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 11 states have internal predecessors, (311), 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) [2024-11-09 10:46:28,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:28,722 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:28,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:46:28,925 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,SelfDestructingSolverStorable14 [2024-11-09 10:46:28,926 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:28,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1747173511, now seen corresponding path program 1 times [2024-11-09 10:46:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:28,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681131637] [2024-11-09 10:46:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:28,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-09 10:46:29,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681131637] [2024-11-09 10:46:29,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681131637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468292920] [2024-11-09 10:46:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:29,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:29,273 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) [2024-11-09 10:46:29,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:46:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:29,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 10:46:29,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:29,404 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 6 treesize of output 5 [2024-11-09 10:46:29,408 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 [2024-11-09 10:46:29,481 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:29,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:46:29,494 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:29,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:29,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:30,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468292920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:30,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:30,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-11-09 10:46:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537854485] [2024-11-09 10:46:30,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:30,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:46:30,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:46:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:46:30,900 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-09 10:46:30,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 386 flow. Second operand has 26 states, 26 states have (on average 27.115384615384617) internal successors, (705), 26 states have internal predecessors, (705), 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) [2024-11-09 10:46:30,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:30,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-09 10:46:30,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:31,836 INFO L124 PetriNetUnfolderBase]: 2886/5394 cut-off events. [2024-11-09 10:46:31,836 INFO L125 PetriNetUnfolderBase]: For 10074/10408 co-relation queries the response was YES. [2024-11-09 10:46:31,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16612 conditions, 5394 events. 2886/5394 cut-off events. For 10074/10408 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 37460 event pairs, 626 based on Foata normal form. 258/5538 useless extension candidates. Maximal degree in co-relation 16474. Up to 1299 conditions per place. [2024-11-09 10:46:31,866 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 120 selfloop transitions, 12 changer transitions 0/148 dead transitions. [2024-11-09 10:46:31,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 148 transitions, 942 flow [2024-11-09 10:46:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 434 transitions. [2024-11-09 10:46:31,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5564102564102564 [2024-11-09 10:46:31,868 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 386 flow. Second operand 13 states and 434 transitions. [2024-11-09 10:46:31,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 148 transitions, 942 flow [2024-11-09 10:46:31,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 148 transitions, 918 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-09 10:46:31,879 INFO L231 Difference]: Finished difference. Result has 102 places, 76 transitions, 406 flow [2024-11-09 10:46:31,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=406, PETRI_PLACES=102, PETRI_TRANSITIONS=76} [2024-11-09 10:46:31,880 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 42 predicate places. [2024-11-09 10:46:31,880 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 76 transitions, 406 flow [2024-11-09 10:46:31,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 27.115384615384617) internal successors, (705), 26 states have internal predecessors, (705), 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) [2024-11-09 10:46:31,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:31,881 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:31,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:46:32,081 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,SelfDestructingSolverStorable15 [2024-11-09 10:46:32,082 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:32,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash -595519865, now seen corresponding path program 1 times [2024-11-09 10:46:32,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:32,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137395938] [2024-11-09 10:46:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:32,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:32,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:32,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137395938] [2024-11-09 10:46:32,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137395938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:32,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528282] [2024-11-09 10:46:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:32,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:32,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:32,368 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) [2024-11-09 10:46:32,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:46:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:32,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:46:32,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:32,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:32,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:46:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:32,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:32,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:32,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 10:46:32,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3520836] [2024-11-09 10:46:32,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:32,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 10:46:32,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 10:46:32,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:46:33,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-09 10:46:33,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 76 transitions, 406 flow. Second operand has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 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) [2024-11-09 10:46:33,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:33,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-09 10:46:33,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:34,113 INFO L124 PetriNetUnfolderBase]: 4091/7772 cut-off events. [2024-11-09 10:46:34,113 INFO L125 PetriNetUnfolderBase]: For 16807/17356 co-relation queries the response was YES. [2024-11-09 10:46:34,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23561 conditions, 7772 events. 4091/7772 cut-off events. For 16807/17356 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 59223 event pairs, 1805 based on Foata normal form. 408/8029 useless extension candidates. Maximal degree in co-relation 23416. Up to 3234 conditions per place. [2024-11-09 10:46:34,157 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 79 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-11-09 10:46:34,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 114 transitions, 856 flow [2024-11-09 10:46:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:46:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:46:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2024-11-09 10:46:34,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-11-09 10:46:34,161 INFO L175 Difference]: Start difference. First operand has 102 places, 76 transitions, 406 flow. Second operand 10 states and 362 transitions. [2024-11-09 10:46:34,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 114 transitions, 856 flow [2024-11-09 10:46:34,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 114 transitions, 812 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-09 10:46:34,172 INFO L231 Difference]: Finished difference. Result has 101 places, 78 transitions, 440 flow [2024-11-09 10:46:34,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=440, PETRI_PLACES=101, PETRI_TRANSITIONS=78} [2024-11-09 10:46:34,173 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 41 predicate places. [2024-11-09 10:46:34,173 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 78 transitions, 440 flow [2024-11-09 10:46:34,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 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) [2024-11-09 10:46:34,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:34,173 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:34,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:46:34,374 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,SelfDestructingSolverStorable16 [2024-11-09 10:46:34,374 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:34,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash 416478131, now seen corresponding path program 1 times [2024-11-09 10:46:34,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:34,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432315360] [2024-11-09 10:46:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:34,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432315360] [2024-11-09 10:46:34,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432315360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4519467] [2024-11-09 10:46:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:34,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:34,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:34,650 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) [2024-11-09 10:46:34,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:46:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:34,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 10:46:34,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:34,780 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 [2024-11-09 10:46:34,783 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 6 treesize of output 5 [2024-11-09 10:46:34,834 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:34,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:34,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:46:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:35,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:35,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4519467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:35,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:35,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-09 10:46:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388767596] [2024-11-09 10:46:35,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:35,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 10:46:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 10:46:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:46:36,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-09 10:46:36,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 78 transitions, 440 flow. Second operand has 28 states, 28 states have (on average 23.464285714285715) internal successors, (657), 28 states have internal predecessors, (657), 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) [2024-11-09 10:46:36,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:36,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-09 10:46:36,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:37,820 INFO L124 PetriNetUnfolderBase]: 8182/13920 cut-off events. [2024-11-09 10:46:37,820 INFO L125 PetriNetUnfolderBase]: For 30598/31659 co-relation queries the response was YES. [2024-11-09 10:46:37,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44768 conditions, 13920 events. 8182/13920 cut-off events. For 30598/31659 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 102111 event pairs, 1664 based on Foata normal form. 633/14329 useless extension candidates. Maximal degree in co-relation 44612. Up to 2775 conditions per place. [2024-11-09 10:46:37,889 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 126 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2024-11-09 10:46:37,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 162 transitions, 1226 flow [2024-11-09 10:46:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 10:46:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 10:46:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 478 transitions. [2024-11-09 10:46:37,891 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46862745098039216 [2024-11-09 10:46:37,891 INFO L175 Difference]: Start difference. First operand has 101 places, 78 transitions, 440 flow. Second operand 17 states and 478 transitions. [2024-11-09 10:46:37,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 162 transitions, 1226 flow [2024-11-09 10:46:37,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1195 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:37,920 INFO L231 Difference]: Finished difference. Result has 115 places, 80 transitions, 484 flow [2024-11-09 10:46:37,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=484, PETRI_PLACES=115, PETRI_TRANSITIONS=80} [2024-11-09 10:46:37,920 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-11-09 10:46:37,920 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 80 transitions, 484 flow [2024-11-09 10:46:37,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 23.464285714285715) internal successors, (657), 28 states have internal predecessors, (657), 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) [2024-11-09 10:46:37,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:37,921 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:37,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:46:38,124 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,SelfDestructingSolverStorable17 [2024-11-09 10:46:38,125 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:38,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1063910132, now seen corresponding path program 1 times [2024-11-09 10:46:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263019049] [2024-11-09 10:46:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:38,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263019049] [2024-11-09 10:46:38,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263019049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380459473] [2024-11-09 10:46:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:38,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:38,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:38,626 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) [2024-11-09 10:46:38,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:46:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:38,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 10:46:38,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:38,742 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 6 treesize of output 5 [2024-11-09 10:46:38,776 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 10:46:38,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 10:46:38,911 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-09 10:46:38,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-09 10:46:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:39,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:39,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380459473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:39,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:39,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2024-11-09 10:46:39,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876927776] [2024-11-09 10:46:39,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:39,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 10:46:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 10:46:39,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=757, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 10:46:40,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-09 10:46:40,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 80 transitions, 484 flow. Second operand has 33 states, 33 states have (on average 23.545454545454547) internal successors, (777), 33 states have internal predecessors, (777), 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) [2024-11-09 10:46:40,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:40,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-09 10:46:40,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:43,091 INFO L124 PetriNetUnfolderBase]: 11915/20202 cut-off events. [2024-11-09 10:46:43,092 INFO L125 PetriNetUnfolderBase]: For 60556/62464 co-relation queries the response was YES. [2024-11-09 10:46:43,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67951 conditions, 20202 events. 11915/20202 cut-off events. For 60556/62464 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 155835 event pairs, 2903 based on Foata normal form. 966/21065 useless extension candidates. Maximal degree in co-relation 67790. Up to 4618 conditions per place. [2024-11-09 10:46:43,220 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 120 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-11-09 10:46:43,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 1344 flow [2024-11-09 10:46:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:46:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:46:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 512 transitions. [2024-11-09 10:46:43,221 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44912280701754387 [2024-11-09 10:46:43,221 INFO L175 Difference]: Start difference. First operand has 115 places, 80 transitions, 484 flow. Second operand 19 states and 512 transitions. [2024-11-09 10:46:43,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 1344 flow [2024-11-09 10:46:43,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1282 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-09 10:46:43,267 INFO L231 Difference]: Finished difference. Result has 128 places, 82 transitions, 543 flow [2024-11-09 10:46:43,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=543, PETRI_PLACES=128, PETRI_TRANSITIONS=82} [2024-11-09 10:46:43,268 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 68 predicate places. [2024-11-09 10:46:43,268 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 82 transitions, 543 flow [2024-11-09 10:46:43,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 23.545454545454547) internal successors, (777), 33 states have internal predecessors, (777), 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) [2024-11-09 10:46:43,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:43,268 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:43,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 10:46:43,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:43,469 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:43,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:43,469 INFO L85 PathProgramCache]: Analyzing trace with hash -880449330, now seen corresponding path program 1 times [2024-11-09 10:46:43,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:43,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972330945] [2024-11-09 10:46:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:43,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972330945] [2024-11-09 10:46:43,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972330945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761542629] [2024-11-09 10:46:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:43,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:43,758 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) [2024-11-09 10:46:43,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:46:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:43,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 10:46:43,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:43,894 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 [2024-11-09 10:46:43,990 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:43,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 10:46:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:44,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-09 10:46:44,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761542629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:44,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:44,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 6] total 24 [2024-11-09 10:46:44,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128445141] [2024-11-09 10:46:44,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:44,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 10:46:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 10:46:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:46:45,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-09 10:46:45,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 82 transitions, 543 flow. Second operand has 25 states, 25 states have (on average 27.12) internal successors, (678), 25 states have internal predecessors, (678), 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) [2024-11-09 10:46:45,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:45,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-09 10:46:45,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:48,040 INFO L124 PetriNetUnfolderBase]: 10637/20297 cut-off events. [2024-11-09 10:46:48,040 INFO L125 PetriNetUnfolderBase]: For 63144/64652 co-relation queries the response was YES. [2024-11-09 10:46:48,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70621 conditions, 20297 events. 10637/20297 cut-off events. For 63144/64652 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 176107 event pairs, 2584 based on Foata normal form. 957/20944 useless extension candidates. Maximal degree in co-relation 70443. Up to 4405 conditions per place. [2024-11-09 10:46:48,203 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 149 selfloop transitions, 22 changer transitions 0/189 dead transitions. [2024-11-09 10:46:48,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 1613 flow [2024-11-09 10:46:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 457 transitions. [2024-11-09 10:46:48,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5858974358974359 [2024-11-09 10:46:48,204 INFO L175 Difference]: Start difference. First operand has 128 places, 82 transitions, 543 flow. Second operand 13 states and 457 transitions. [2024-11-09 10:46:48,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 1613 flow [2024-11-09 10:46:48,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1509 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-11-09 10:46:48,298 INFO L231 Difference]: Finished difference. Result has 129 places, 84 transitions, 565 flow [2024-11-09 10:46:48,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=565, PETRI_PLACES=129, PETRI_TRANSITIONS=84} [2024-11-09 10:46:48,299 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2024-11-09 10:46:48,299 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 84 transitions, 565 flow [2024-11-09 10:46:48,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 27.12) internal successors, (678), 25 states have internal predecessors, (678), 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) [2024-11-09 10:46:48,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:48,300 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:48,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:46:48,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:48,504 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:48,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash -834510873, now seen corresponding path program 1 times [2024-11-09 10:46:48,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:48,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468945637] [2024-11-09 10:46:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:48,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:48,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:48,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468945637] [2024-11-09 10:46:48,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468945637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:48,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652982744] [2024-11-09 10:46:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:48,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:48,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:48,836 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) [2024-11-09 10:46:48,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:46:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:48,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:46:48,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:49,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:49,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 10:46:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:49,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652982744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:49,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:49,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-09 10:46:49,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522434359] [2024-11-09 10:46:49,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:49,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 10:46:49,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 10:46:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-09 10:46:50,052 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-09 10:46:50,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 84 transitions, 565 flow. Second operand has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 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) [2024-11-09 10:46:50,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:50,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-09 10:46:50,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:53,551 INFO L124 PetriNetUnfolderBase]: 12845/24464 cut-off events. [2024-11-09 10:46:53,552 INFO L125 PetriNetUnfolderBase]: For 86398/88246 co-relation queries the response was YES. [2024-11-09 10:46:53,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88373 conditions, 24464 events. 12845/24464 cut-off events. For 86398/88246 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 215361 event pairs, 3452 based on Foata normal form. 1143/25330 useless extension candidates. Maximal degree in co-relation 88198. Up to 5988 conditions per place. [2024-11-09 10:46:53,759 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 151 selfloop transitions, 22 changer transitions 0/191 dead transitions. [2024-11-09 10:46:53,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 191 transitions, 1754 flow [2024-11-09 10:46:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2024-11-09 10:46:53,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-11-09 10:46:53,760 INFO L175 Difference]: Start difference. First operand has 129 places, 84 transitions, 565 flow. Second operand 13 states and 486 transitions. [2024-11-09 10:46:53,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 191 transitions, 1754 flow [2024-11-09 10:46:53,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 1687 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-09 10:46:53,879 INFO L231 Difference]: Finished difference. Result has 135 places, 86 transitions, 604 flow [2024-11-09 10:46:53,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=604, PETRI_PLACES=135, PETRI_TRANSITIONS=86} [2024-11-09 10:46:53,879 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2024-11-09 10:46:53,879 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 86 transitions, 604 flow [2024-11-09 10:46:53,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 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) [2024-11-09 10:46:53,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:53,880 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:53,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 10:46:54,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:54,081 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:54,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash 734782558, now seen corresponding path program 2 times [2024-11-09 10:46:54,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:54,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142254308] [2024-11-09 10:46:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:54,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 10:46:54,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142254308] [2024-11-09 10:46:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142254308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477096411] [2024-11-09 10:46:54,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:46:54,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:54,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:54,583 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) [2024-11-09 10:46:54,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:46:54,717 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:46:54,717 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:46:54,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-09 10:46:54,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:54,729 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 6 treesize of output 5 [2024-11-09 10:46:54,853 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 10:46:54,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 10:46:54,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 10:46:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:46:55,072 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:55,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2024-11-09 10:46:55,077 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:55,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:55,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:56,162 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 161 treesize of output 155 [2024-11-09 10:46:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:46:57,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477096411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:57,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:57,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 46 [2024-11-09 10:46:57,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501274883] [2024-11-09 10:46:57,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:57,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 10:46:57,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 10:46:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1885, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 10:47:00,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-11-09 10:47:00,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 86 transitions, 604 flow. Second operand has 48 states, 48 states have (on average 20.0) internal successors, (960), 48 states have internal predecessors, (960), 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) [2024-11-09 10:47:00,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:00,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-11-09 10:47:00,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:08,026 INFO L124 PetriNetUnfolderBase]: 29429/48532 cut-off events. [2024-11-09 10:47:08,027 INFO L125 PetriNetUnfolderBase]: For 203798/207539 co-relation queries the response was YES. [2024-11-09 10:47:08,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189060 conditions, 48532 events. 29429/48532 cut-off events. For 203798/207539 co-relation queries the response was YES. Maximal size of possible extension queue 1176. Compared 398789 event pairs, 5611 based on Foata normal form. 522/48869 useless extension candidates. Maximal degree in co-relation 188881. Up to 8287 conditions per place. [2024-11-09 10:47:08,651 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 223 selfloop transitions, 24 changer transitions 0/259 dead transitions. [2024-11-09 10:47:08,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 259 transitions, 2395 flow [2024-11-09 10:47:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:47:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:47:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 506 transitions. [2024-11-09 10:47:08,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.443859649122807 [2024-11-09 10:47:08,653 INFO L175 Difference]: Start difference. First operand has 135 places, 86 transitions, 604 flow. Second operand 19 states and 506 transitions. [2024-11-09 10:47:08,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 259 transitions, 2395 flow [2024-11-09 10:47:09,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 259 transitions, 2322 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-09 10:47:09,142 INFO L231 Difference]: Finished difference. Result has 146 places, 88 transitions, 644 flow [2024-11-09 10:47:09,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=644, PETRI_PLACES=146, PETRI_TRANSITIONS=88} [2024-11-09 10:47:09,143 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 86 predicate places. [2024-11-09 10:47:09,143 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 88 transitions, 644 flow [2024-11-09 10:47:09,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 20.0) internal successors, (960), 48 states have internal predecessors, (960), 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) [2024-11-09 10:47:09,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:09,143 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:09,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 10:47:09,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:09,344 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:47:09,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash 824355742, now seen corresponding path program 1 times [2024-11-09 10:47:09,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646956388] [2024-11-09 10:47:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-09 10:47:09,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:09,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646956388] [2024-11-09 10:47:09,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646956388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:09,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:09,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:47:09,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604167008] [2024-11-09 10:47:09,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:09,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:09,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-09 10:47:09,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 88 transitions, 644 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-11-09 10:47:09,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:09,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-09 10:47:09,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:13,086 INFO L124 PetriNetUnfolderBase]: 14184/24555 cut-off events. [2024-11-09 10:47:13,086 INFO L125 PetriNetUnfolderBase]: For 106379/108968 co-relation queries the response was YES. [2024-11-09 10:47:13,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96681 conditions, 24555 events. 14184/24555 cut-off events. For 106379/108968 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 199291 event pairs, 10966 based on Foata normal form. 36/23182 useless extension candidates. Maximal degree in co-relation 96499. Up to 17841 conditions per place. [2024-11-09 10:47:13,384 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 86 selfloop transitions, 2 changer transitions 1/109 dead transitions. [2024-11-09 10:47:13,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 109 transitions, 1008 flow [2024-11-09 10:47:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:47:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:47:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-09 10:47:13,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-11-09 10:47:13,385 INFO L175 Difference]: Start difference. First operand has 146 places, 88 transitions, 644 flow. Second operand 3 states and 129 transitions. [2024-11-09 10:47:13,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 109 transitions, 1008 flow [2024-11-09 10:47:13,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 109 transitions, 961 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-11-09 10:47:13,677 INFO L231 Difference]: Finished difference. Result has 134 places, 88 transitions, 613 flow [2024-11-09 10:47:13,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=613, PETRI_PLACES=134, PETRI_TRANSITIONS=88} [2024-11-09 10:47:13,677 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2024-11-09 10:47:13,677 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 88 transitions, 613 flow [2024-11-09 10:47:13,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2024-11-09 10:47:13,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:13,677 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:13,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-09 10:47:13,678 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:47:13,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1303423644, now seen corresponding path program 2 times [2024-11-09 10:47:13,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:13,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567252936] [2024-11-09 10:47:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:13,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:14,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:14,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567252936] [2024-11-09 10:47:14,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567252936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:14,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781636809] [2024-11-09 10:47:14,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:14,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:14,101 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:14,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:47:14,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:47:14,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:14,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 10:47:14,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:14,217 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 6 treesize of output 5 [2024-11-09 10:47:14,219 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 6 treesize of output 5 [2024-11-09 10:47:14,270 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 10:47:14,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 10:47:14,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 10:47:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:47:14,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:47:14,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2024-11-09 10:47:14,412 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-09 10:47:14,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 10:47:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 10:47:14,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 10:47:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781636809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:15,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 21 [2024-11-09 10:47:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480675003] [2024-11-09 10:47:15,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:15,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:47:15,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:47:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:47:17,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-09 10:47:17,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 88 transitions, 613 flow. Second operand has 22 states, 22 states have (on average 21.818181818181817) internal successors, (480), 22 states have internal predecessors, (480), 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) [2024-11-09 10:47:17,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:17,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-09 10:47:17,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:22,748 INFO L124 PetriNetUnfolderBase]: 19578/32602 cut-off events. [2024-11-09 10:47:22,748 INFO L125 PetriNetUnfolderBase]: For 139758/142056 co-relation queries the response was YES. [2024-11-09 10:47:23,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129237 conditions, 32602 events. 19578/32602 cut-off events. For 139758/142056 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 259398 event pairs, 2840 based on Foata normal form. 732/32803 useless extension candidates. Maximal degree in co-relation 129069. Up to 4526 conditions per place. [2024-11-09 10:47:23,155 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 201 selfloop transitions, 24 changer transitions 0/240 dead transitions. [2024-11-09 10:47:23,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 240 transitions, 2222 flow [2024-11-09 10:47:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 10:47:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-09 10:47:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 613 transitions. [2024-11-09 10:47:23,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42569444444444443 [2024-11-09 10:47:23,157 INFO L175 Difference]: Start difference. First operand has 134 places, 88 transitions, 613 flow. Second operand 24 states and 613 transitions. [2024-11-09 10:47:23,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 240 transitions, 2222 flow [2024-11-09 10:47:23,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 240 transitions, 2182 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-09 10:47:23,384 INFO L231 Difference]: Finished difference. Result has 150 places, 87 transitions, 635 flow [2024-11-09 10:47:23,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=635, PETRI_PLACES=150, PETRI_TRANSITIONS=87} [2024-11-09 10:47:23,385 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 90 predicate places. [2024-11-09 10:47:23,385 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 87 transitions, 635 flow [2024-11-09 10:47:23,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 21.818181818181817) internal successors, (480), 22 states have internal predecessors, (480), 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) [2024-11-09 10:47:23,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:23,385 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:23,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 10:47:23,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:23,586 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:47:23,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1417275307, now seen corresponding path program 2 times [2024-11-09 10:47:23,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:23,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436267627] [2024-11-09 10:47:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:23,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:24,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:24,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436267627] [2024-11-09 10:47:24,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436267627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:24,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093601387] [2024-11-09 10:47:24,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:24,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:24,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:24,191 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:24,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:47:24,359 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:47:24,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:24,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 10:47:24,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:24,369 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 6 treesize of output 5 [2024-11-09 10:47:24,477 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:47:24,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-09 10:47:24,485 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:47:24,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:47:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:24,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:24,891 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 52 treesize of output 48 [2024-11-09 10:47:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:25,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093601387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:25,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:25,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 38 [2024-11-09 10:47:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868495255] [2024-11-09 10:47:25,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:25,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 10:47:25,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 10:47:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482